List of Sgt. Frog characters
|This article relies on references to primary sources. (October 2008)|
||It has been suggested that Shurara Corps be merged into this article. (Discuss) Proposed since June 2012.|
Keroro Platoon 
The Keroro Platoon (ケロロ小隊 Keroro Shōtai ) is led by Sergeant Keroro. While most platoons contain thirty or forty soldiers, the Keroro Platoon only has a meager five. Its full name is the Gamma Planetary System, the 58th Planet, Space Invasion Army Special Tactics Platoon (ガマ星雲 第58番惑星 宇宙侵攻軍特殊先行工作部隊 Gama Seiun Dai Gojūhachiban Wakusei Uchū Shinkōgun Tokushu Senkō Kōsaku Butai ). In the English dub of the anime, the unit is referred to as the Advance Recon Mission Preparatory Invasion Terror Platoon (A.R.M.P.I.T.). Keroro refers to the acronym as being "unfortunate".
The initial operation of the Keroro Platoon was to stealthfully survey Earth and relay information to the awaiting Keron Invasion Army. The five members were dispatched throughout Greater Tokyo and surrounding area to assess Earth's weakness and prepare for total military takeover. Having quickly infiltrated the Hinata house, Sergeant Keroro concealed himself in one of the bedrooms, but was accidentally discovered by the Hinata children, a pair of middle school siblings. Shocked by their ability to see him, he was overpowered, captured and temporarily stripped of his weapon, the Kero Ball. With Keroro coming into direct contact with the Earthlings, the invading army lost their element of surprise, deemed the campaign compromised and immediately started withdrawal procedures from Earth's orbit.
Abandoned by the army and without the support of his platoon, Keroro must unite his scattered soldiers, survive his prisoner of war manual labor, and outwit his captors. He is eventually united with his platoon and subsequently given revised orders to continue the invasion campaign, but by themselves. Now, they must fulfill their new mission, protect their human friends, their home base, and the Earth from other alien invaders.
The platoon's hierarchy in military rank is similar to the Army ranks of the Japanese Empire during World War II and have based certain weapons and terms after the Imperial Japanese Military, but remains faithful to the perception of the alien invader with higher technological achievements.
Sergeant Keroro (ケロロ軍曹 Keroro Gunsō ) is the toad leader of the Keroro Platoon, evidenced by the leadership star he wears on his belly. He has a green body and yellow headgear with a red star in the middle, symbolizing that he is a leader. When members of the Keroro Platoon happen to be caught in an explosion of some kind, they are seen with an afro. Keroro's black afro is most commonly seen.
Keroro used to be a good officer, but since his arrival to Earth, he has lost most of his interest in the invasion, preferring to spend his time making Gundam models, watching anime (specially the Space Captain Geroro series, a parody of Space Battleship Yamato), or reading manga, when he is not doing the house chores of the Hinata household. Occasionally, specially when there is a lot of moisture in the air (similar to the levels back in Keron), he reverts to his previous self, but that usually ends with a Nyororo sucking off all of Keroro's moisture.
Keroro is carefree, happy-go-lucky, negligent, greedy, vengeful, unlucky and a coward (especially against Natsumi), with a short attention span for anything not related to his models, though he occasionally displays bouts of unselfishness and bravery. He often misspends the invasion budget on models and he always leaves all the paperwork for their bosses back in Keron for the last possible moment, often ending up punished for it. He is childhood friends with platoon members Giroro and Dororo, and the responsible for most of the latter's traumas.
His invasion plans often hide personal goals, like getting back at Natsumi, and even when they do not, they are often harebrained ideas without a chance of success. His plans for raising money usually follow the same pattern and often involve Momoka hiring them for some crazy plan of her own. The few plans that do have a chance of success usually fail due to setbacks, Fuyuki's friendship appeals or because another character points out that if Earth is destroyed, it would mean no more Gundam models.
Keroro's goal is the platoon stay healthy, but Giroro thought he liked Gundam models so much, he wanted all of them.
Keroro ends most of his sentences with de arimasu, a variant form of 'desu'.
Private Second Class Tamama (タママ二等兵 Tamama Nitōhei ) is ranked Private Second Class in the Keron Army's Keroro Platoon. He is the newest member in the planetary invasion troop, and also the youngest, still having his tadpole tail and white face. Tamama has a dark blue body with yellow headgear and big round eyes. He wears a green and yellow mark on his head and belly, which matches the Shoshinsha mark that new drivers in Japan must display on their cars for one year after obtaining their licenses. His afro is a reddish-brown. He first appears on the third chapter of the manga and in the 2nd episode of the anime.
Tamama idolizes and has strong feelings towards Keroro, though the latter seems unaware of them. He hates Mois because of his own feelings for Keroro, and trains hard until the day when he defeats her and gains Keroro's affection. However, sometimes he is ashamed of his own evilness when faced with Mois's pure heart. He relies on pure energy in battle, shooting his powerful attack, Tamama Impact, (earlier referred to as Tamama crazy breath), a yellow energy beam from his mouth, and he's often seen training, usually beating up a piece of wood with a sloppy drawing of Mois.
Tamama has mood swings that border on a split personality, just like his human partner Momoka Nishizawa. While usually gentle and cheerful, Tamama can become a vengeful, raving maniac at the drop of a hat. Tamama is also prone to fits of jealousy, usually towards anyone who gets near Keroro, especially Angel Mois, who he frequently refers to as "that woman" or "this woman". These negative feelings power his energy beam.
Tamama ends most of his sentences with desū, a variant of 'desu' and considered as "cute".
Tamama also played Biff from Back To The Future 3 (According to the Wikipedia in the Sergeant Frog anime world (See episode 58))
Corporal Giroro (ギロロ伍長 Giroro Gochō ) is the Corporal of the Keroro Platoon and their weapons expert. His body is a dark red in color, while his headgear is dark maroon with a skull in the middle. He is the only member of the platoon who doesn't wear a symbol in his belly. Instead, he wears a belt with a rectangular buckle diagonally across his body. However, when he was a tadpole, he had a skull symbol on his belly. His afro, which is rarely seen, is blond. He first appears on the second volume of the manga, chapter 11, and in the 4th episode of the anime.
Giroro is in love with Natsumi Hinata, something everyone but Natsumi seems to know, since she defeated all his traps he set when he arrived to the Hinata house. That is why he would attack anyone who harms her and also the reason why he views Mutsumi Saburo as a strong romantic rival, but also Koyuki, who has a crush on her. Ever since his first encounter with the Hinatas, Giroro has been living in a tent in their backyard, where he roasts sweets potatoes he sometimes shares with Natsumi and obsessively cleans his weapons. The buckle of his belt hides his treasure, a photo of Natsumi. Although he loves Natsumi enough to have it named as an obsession he is also seen to be somewhat of a ladies man as he blushes and drools while in a maid themed restaurant.
Giroro has a short temper, and he is often irritated by the laid back and unfocused attitude towards the invasion of the other members of the Platoon, specially Keroro. He appears to be gruff, but he is an honorable frog with a good heart. He often shares his tent with a whitish pink female cat whom he rescued from the rain and named "Miss Furbottom. Unknowingly to him, the cat is in love with Giroro. He lacks any other hobby apart from his weapons and he is terrified of ghosts and sea cucumbers. He also cannot drink more than a drop of alcohol without passing out.
Giroro's goal is world domination so much, he almost forgets about Natsumi.
Despite being absolutely dedicated to the call of duty, Giroro is often used as comic relief throughout the series. Most often he is crushed by something dropped from Natsumi's window, or a falling object from space, usually containing an alien of some sort (or Karara). Other times his romantic dilemma with Natsumi is what leaves him uncharacteristically clumsy and blundering. His feelings toward her are also often used by other characters to get him to agree to something, by saying that she will like it. That's why sometimes, even if the invasion plan fails, he is seen with a dopey happy grin on his face if the outcome had made Natsumi happy.
Giroro is the one who suffers more misfortunes of the entire platoon, either by accident, bad luck or by being deliberately chosen by Keroro, Tamama and/or Kululu as guinea pig. Among others, Giroro has been forcefully attached to a machine to be used as a living "fear-meter" during a horror story competition, merged with Keroro, became merged with Natsumi's right hand due to a failed experiment, transformed into a liquid form and even he also became human for a short time, with blond hair and tan skin in episode 196, Return of GeroGero 30 minutes. One of these accidents happened during an experiment to bring out the strongest personality from within, where Giroro mistakenly set off the "energy bullet" that was originally meant for Keroro. He split into 7 characters (including the original), one for each physical manifestation of his personality.
- Giroppe - The evil Giroro. He is out to invade mercilessly. He is also incredibly fast and holds no affection for Natsumi.
- Girorin - The fear-filled Giroro. Eventually, being tired of his cowardly self, he threw his stuffed bear aside and faced his fears head-on by battling Giroppe only to be defeated in one blow.
- Girocchi - The housewife-like Giroro. He appeared in Natsumi's room, aptly dressed, serving snacks that were disgustingly inedible and hated, much to his sadness.
- Girosama - The Giroro with the fantastic laugh. He appeared with a fluffy shag cut, scarf, and yellow tinted sunglasses. He does nothing but smile and laugh.
- Giroko - The poetic Giroro. He entered a poet contest on 623's radio station but before the winner was announced, Giroppe blasted through the door, destroying the radio.
- Giropon - The Giroro that lives for love. When first introduced, he appeared holding a bundle of red roses in a white tuxedo with his hat curled up, saying,"Natsusmi, hold me tight!", a part of the password for Natsumi's Super necklace. He questioned Mutsumi's intentions towards Natsumi and immediately attacks him, but was quickly defeated.
Giroro ends some of his sentences with da, a plain copula.
Sergeant Major Kululu (クルル曹長 Kururu Sōchō ) is the head of communications in the Keroro Platoon. His body is yellow in color, with orange headgear that includes two headphone-like white pieces over his ears. His forehead and belly mark is a filled spiral. He also wears glasses with spirals on them. He first appears on the second volume of the manga, chapter 20, and in the 9th episode of the anime. Kululu was originally blue when he was little, but at the end of the short movie Secret of the Kero Ball, he became yellow, due to being stuck in a huge plate of curry that Keroro made for him from the Kero Ball. As a tadpole he had a pacifier and a bib.
Although he is of a higher rank than Keroro, he is not the leader of the Platoon due to his unpleasant and unnerving demeanor, which has given him the nickname of 'Yellow Devil'. Kululu is renowned to be enigmatic, deceitful, and downright evil, lazy and has a habit snickering at the beginning and end of a sentences. Unlike the rest of the platoon who specialize in combat, Kululu's expertise lies in his high-level technological prowess, including hacking and inventing, and has designed and created most of the gadgets and weapons used by the platoon. Being the least emotional of the Keroro Platoon, he is almost never seen being moved to tears or smiles by any events, though at the same time he rarely, if ever, panics when something goes wrong, likely due to the multiple dangers from his own inventions outweighing it. Although he smiles while being beaten or beating and or tricking (causing pain) to others. He encourages his abuse as long as he doesn't die or mess with his experiments. This was shown in 'How to Succeed in Pekoponian Conquering Without Really Trying' when Fuyuki and Natsumi start punching him and he says "At least I got you to beat me. Come on beat me, I want you to, you want to, everyone wins." Kululu's Achilles' heel is Mois' pure heart. He has no defense against it, and when confronted by it, he's willing to do anything just to get her to leave although she is usually in his lab working with him or working for him.
Keroro asks Kululu what his goal is, but he laughs his "Kukukuku" laugh that everyone gets scared and Keroro asks Tamama what his goal is to change the subject.
He is generally disliked by everyone, most of the characters seeing him as a disagreeable prankster ( except on episode "The Red String Theory" when Karara falls in love with him for saving her from her father) and, in the series, action figures of him tend to sell very poorly on Keron, (much to Kululu's chagrin) but Kululu seems to take pride in his bad attitude. When ever something bad happens to another character or is blamed for doing something, he laughs in a medium to high pitched voice saying "Kukukukukukuku". Despite his attitude, he gets along quite well with Mutsumi, his human friend, and Aki Hinata, with whom he has a stalkerish crush on. Kululu and Giroro greatly loathe each other due to their vast differences (Brain vs. Brawn) and as a result, Kululu usually uses Giroro as a guinea pig for any invention that he creates. Kululu has a genuine love and talent for curry, but this is often taken to an extreme point where he can even bathe in it.
His name comes from the Japanese word for the phrase "round and round" ("kurukuru"), referring to the spirals seen on his glasses. His name may also come from the incurable brain disease named 'Kuru' The term "kuru" derives from the Fore word "kuria/guria", 'to shake' a reference to the body tremors that are a classic symptom of the disease; it is also known among the Fore as the laughing sickness due to the pathologic bursts of laughter people would display when afflicted with the disease. This may also refer to Kululu's insane 'Kukuku' laugh.
Kululu ends some of his sentences with da ze.
Lance Corporal Dororo (ドロロ兵長 Dororo Heichō ) is the latest of the platoon to appear. His body is medium blue (although painted completely black in the manga) with light gray ninja-like headgear and mouthpiece. His forehead and belly mark is a four-pointed shuriken and he always carries a sheathed knife on the back. His pink afro is the one seen more rarely. He is the last member of the platoon to appear, making his debut in the 7th volume of the manga, chapter 55, and the 13th episode of the anime.
Then known as Lance Corporal Zeroro (ゼロロ兵長 Zeroro Heichō ), he graduated from the Keron Military Academy under the rank of Lance Corporal. After serving alongside Zoruru in an elite assassin squad, under the command of Captain Jirara, he was assigned as the assassin of the Keroro Platoon alongside Keroro, Giroro, Tamama and Kululu. They were given the mission to conquer Pekopon. After crash landing on Pekopon, Zeroro was rescued by ninja-in-training Koyuki Azumaya (in the anime, he was rescued by Koyuki and her dog Zeroyasha). Wishing to follow the way of the ninja, Zeroro changed his name to Dororo.
His reunion with the rest of the platoon does not start well, since he just appears to resign because he no longer shares their invasion objectives. He tells Koyuki that life with her and the peacefulness of earth brought him a new perspective of life. However, after he and Koyuki are captured by Viper and the platoon comes to rescue them, they mend their friendship after Keroro tells him that he broke his music box and that he wishes their friendship can be mended and he rejoins the platoon, after making them steam a bit. In the manga, he and Koyuki move to a house besides the Hinatas, but in the anime they live in a small traditional house in the mountain, bordering the Nishizawa state.
As Dororo, his goal is to save the world, but he stupidly helps the platoon defeat people who are spying on them for a newspaper.
As Dororo, he is a kind and meek soul, but his skills in stealth and speed-based attacks are unrivaled. He spends most of his time training, reading, or spying on the actions of Keroro Platoon and others. Dororo is often forgotten by the rest of Keroro Platoon but not Miororo, causing his psychological trauma switch (something created from similar childhood incidents of comic abuse and neglect, most of them Keroro's fault such as merry-go-round of death or supposedly losing an arm) to turn on, making him sit in a corner and cry but miroro said it,s ok. Also, Dororo will not participate in plans that are potentially harmful to people's feelings or well being, the nature, and Miororo, etc. He was a childhood friend of Keroro and Giroro and Pururu as a child and still looks up to his leader and the corporal but they both seem to forget his name. Giroro seems to remember him more than Keroro but almost never has Kululu harmed him or caused his trauma switch to turn on like the others do..
Dororo speaks very formally and often ends his sentences with de gozaru, an archaic form of 'desu'. His laughter thrives from the word zaru. Dororo's self referring nickname, 'sessha', is an archaic male form of "I", primarily used by samurai. In one episode of the anime when he and Koyuki were training in the mountain he said "Koyuki if we don't make it then..." but never admitted his feelings to koyuki. Dororo is in love with Miororo. Dororo,s love for miororo is big if Dororo or miororo die then they will be so sad.
Shin Keroro 
Shin Keroro is the new, sixth member of the platoon, and also the youngest, who features in the manga. He is a Kiruru DNA clone of Keroro, he has a similar personality as Keroro such as playing video games and building Gunpla models with him. Unlike other platoon, being a mobile weapon, which his Keron Star holds his weapon when he turns and presses it. He has three forms called T-style, G-style, and D-style, he's very skilled at using them as he almost defeated the whole platoon. In his T-style, his skin is now dark blue like Tamama's and his arms are larger with a wakaba symbol on his fists, which he battles by using his tough punches, in his G-style his skin is red and his cap is dark red, it also features a black scar below his left eye, similar feature to Giroro's. When he use his G-style, he battles using his futuristic firearms, but its not used in the manga. In his D-style, his skin is blue and his cap is white like Dororo's, his unique feature is face and belly are black, and he battles using his two claws, sometimes a knife, which he also used when he defeated Koyuki. His bracelet is a new model of the Kero Ball. His best friend is Tomosu.
Keroro Platoon Robot Double 
The Keroro double platoon was created by the Keroro platoon to stand in for them while they took the day off. The double platoon is easily differentiated from the real one due to their differently shaped eyes, and their somewhat curled feet (and, in Kululu's double case, a conic head), but Fuyuki and Natsumi were unable to notice the difference. However, they were left in invasion mode and tried to invade Earth for real before the real platoon stopped them.
The platoon took the robots off again to do their homework, apparently limited by Kululu. However, the platoon changed mode to "do whatever you want" and took their obsessions to the extreme. They escaped to space and committed several felonies. Garuru's platoon was charged with stopped them but mistook them for the real Keroro platoon. The Garuru platoon defeated them but they didn't realize they were robots.
Garuru Platoon 
Voiced by: Akio Ōtsuka
First Lieutenant Garuru (ガルル中尉 Garuru Chui ) is a Keronian S-rank sniper, a first lieutenant of the Keron Army, and the leader of the Garuru Platoon. The Keron Army sent the Garuru Platoon to replace the Keroro Platoon in their mission to conquer Pekopon, in episodes 101-103. Garuru defeated his younger brother Giroro in a one-on-one gun match, but was later defeated in a rematch. Thanks to the Keroro Platoon's friendship and united power, the Garuru Platoon was defeated. It was however strongly hinted that Garuru's true mission was merely to test the abilities of the Keroro Platoon.
Garuru is known for being an ideal platoon leader: powerful, strictly no-nonsense in battle, and gravely intimidating. However, Garuru does show a lighter side once in a while, especially when matters concern his younger brother Giroro. Humorously, he has trouble using chopsticks.
Formerly Tamama's apprentice and still calls him "master," or "senpai", Private First Class Taruru (タルル上等兵 Taruru Jōtōhei ) was more clumsy than Tamama in the past. Taruru first appeared to see if all the rumors about the Keroro Platoon was true, revealing what Tamama told him about the platoon. In the anime he also appeared a couple of times with his childhood friend Karara, forming a duo of mischievous tadpoles. Despite Taruru's clumsiness in the past, he became skilled since training with the Garuru Platoon and has exceeded Tamama in both growth and rank, defeating him in a face-off, but was defeated by a persevering Tamama.
Taruru is light blue with gray headgear and wears the Koreisha mark in belly and forehead. In his first appearance, he still had his tadpole tail, but later grew up and lost it.
Voiced by: Kappei Yamaguchi
Recruit Tororo (トロロ新兵 Tororo Shinpei ) is the newest member of the Garuru Platoon who, like Kululu, is the team's intelligence officer and hacker. He captured the allies of the Keroro Platoon until the computers were damaged by Dororo's deathblow.
According to Kululu, Tororo was his rival back in Planet Keron because of his desire to prove others of his higher intelligence and to put Kululu down. Because of Tororo losing to Kululu several times, the young, twisted, and mad genius attempted attacks upon him, though, he could never gain his desired victory.
He later destroyed the entire Keroro Platoon Double. He then visited the real platoon in un-wanted honor. He usually laughs like Kululu.
Voiced by: Kazuki Yao
Lance Corporal Zoruru (ゾルル兵長 Zoruru Heichō ) was once a former partner of Dororo's. He captured the allies of the Keroro Platoon until embarrassed to be forgotten by Dororo. He was defeated by Dororo Double and visited the Keroro Platoon in honor. Also known to have worked with Keroro, Giroro and Dororo/Zeroro prior to the Earth invasion. He was the only one who was not defeated while on Earth. He appears in episode 101-103. He also appears in episode 130, batteling the robot doubles of the keroro platoon. His 3rd appearance is in episode 336. He also appears for a brief moment in the 3rd Sgt. Frog movie credits.
Voiced by: Satsuki Yukino
Chief Medic Pururu (プルル看護長 Pururu Kangochō ) appears in the series as the most recent and only female member of the Garuru Platoon, a chief medic and expert nurse, and a childhood friend to Keroro, Giroro, and Dororo. She has an energetic, down-to-earth, and somewhat strict and stubborn personality, but is also nonviolent and mature, unlike most of the major characters of the series. She graduated from the Keron Military Academy at the same time as her childhood friends Keroro, Giroro, and Dororo. Pururu is also sometimes referred to as obaa-chan which means old lady -which makes her go into small questioning fits of self worth- despite her still having a tail.
In the anime series, she later comes to stay on Earth to take care for the health of Keroro's Platoon.
Shurara Corps 
Shurara/Shirara (シュララ/シララ) 
The leader. His real name is Shirara. When he was young, he was a friend of Pururu, who was kind to him when he was hurt, and put a star-shaped plaster on him. Due to this he has a crush on Pururu. However Keroro ripped the plaster off him, and although Pururu punished him, Shirara was upset and vowed revenge. So when he found a special helmet called the Keromet he put it on and was powered up. He changed his name to Shurara, formed the Shuara Corps and decided to get Keroro's Keron Star off him. However the helmet malfunctioned and Shirara had to destroy it. After this he became Shirara again and returned to Keron with Pururu.
Putata (プタタ) 
Voiced by: Kentaro Tone
Putata is a skilled artist who is working for one of Planet Keron's overzealous killers, the Shurara Corps. He has the color of orange around his left eye, painted spots on his body, and his main color is a lighter shade of canary yellow. Putata's symbol on his stomach and forehead are in the shape of a light green shuriken. His paint brush and cap-like helmet are made out of mostly silver-colored metal, and it appears that Putata's paint brush is also used as a fatal weapon, including Keronian's weakness, a smaller version of a Nyororo. His paint brush has its limit of ink, so Putata has to use his Nyororo painbrush to suck Keronians up and use the liquid as ingredients for ink to make his drawings come to life, however Keroro destroyed the paintbrush by holding some hot curry as he was sucked.
In the episode where he was first introduced, Putata was seen vandalizing the residence and property of the Hinata family. The Keroro Platoon, by that time, did not know that he was a part of the Shurara Corps.
Putata usually laughs like Kululu, with his snickers at the beginning and end of sentences. Except he has his own style of laughing. "プ-タ プタ プタ!" (Pu-ta puta puta!) Putata also usually shouts "Yeah yeah yeah! Yo yo yo!" while painting. Putata's way of acting is different also, except he is the most energetic, lively, and vivid of the Shurara Corps, with his snickers and joyous shouts being heard almost always. He is very rarely seen being moved to tears, nor has he ever been bereaved by anyone else, whether it was situations he or his team are up against or minor problems he has to fix.
Mekeke (メケケ) 
Voiced by: Chō
The puppeteer. He appeared in episode 161 with Putata and can take control of whoever he attaches his strings to, he was also controlling a puppet when the real him was invisible for the whole of the episode except at the end when he was revealed by Mutsumi/Saburo.
Giruru (ギルル) 
Voiced by: Kunihiko Yasui
The mutant. He's what's called a liquid keronian and appears in episode 169, when he turns Giroro into liquid form and sets out to attack Natsumi. He also appears in 177 when Dokuku frees him.
Dokuku (ドクク) 
Voiced by: Takeshi Kusao
The ghost. He is what's called a gas keronian, and is Giruru's younger brother, he came to tell Giruru that he was quitting the Shurara Corps because he was not being paid enough. This was in episode 177. He also has the ability to possess people by going up their bottoms, and took control of Tamama mainly but also briefly took over the rest of the platoon and Fuyuki.
Kagege (カゲゲ) 
Voiced by: Toshio Furukawa
The assassin. Like Yukiki he appears in episode 202 in Shuraras base and fought the platoon with their own shadows but was soon defeated after the lights were off. His name comes from the Japanese word kage (影 shadow).
Nuii (ヌイイ) 
Voiced by: Kurumi Mamiya
The living plushie of the team. Former member of Keroro's alliance against the Black Stars. She was at first a doll, but Shurara brought her to life.
Gyororo (ギョロロ) 
Voiced by: Hiromi Hirata The Spy. He appeared in episode 188 and was controlling Nuii who soon broke free of Gyororo's control and turned on him.
Robobo (ロボボ) 
Voiced by: Keiichi Sonobe
The robot. Robobo turned everyone into an electrical appliance to make them helpless but Dororo came in and defeated him, but came back bigger so the platoon had to use the Grand Keron to defeat him. This was in episode 185.
Yukiki (ユキキ) 
Voiced by: Eiji Maruyama
The snowman. He appeared in episode 202 and was laughed at when the platoon saw his weapons and was easily defeated when Kululu stopped the snow falling.
Keroro Land characters 
Keroro Land Allies 
In the spin-off series in Keroro Land, Keroro created an alliance to fight against the Black Stars. This alliance included: Toriri (bird-like), Saruru (monkey-like), Inunu (dog like), Aruru (a nurse), Mukaka, Tsunene (fox-like), Tanunu (tanuki-like), Golulu (a golem) and Garar (a sand granite Keronian).
Black Stars 
a fictional team Keroro Land that consists of four deadly daredevil Keronians bent on conquering Keron: Mahaha who specializes in cycling, Merara who specializes in hoverboarding, Megaga and Mekaka.
Firuru (フィルル Firuru ) 
Firuru appears in the Sgt. Frog spin-off magazine Keroro Land. Firuru (sometimes written as Filulu or Fielulu) is a sports doctor and the leader of Team Sporty in the Keroro Land magazine. This team, consisting of members Piroro, Metoto, Besusu, Pokaka, and Oyoyo, was assembled in order to fight against the Black Stars, a group of four evil Keronians. Other teams were led by Keroro, Giroro, Zeroro (Dororo while back on Keron), and Zoruru.
Keroro Platoon's Family 
Keroro's father ("the Demon Sergeant") 
The father of Keroro. He is idolized as the highest-ranked member of the Keron Army. He is both admired and feared by his beloved son. He frequently appears on vacation. He saved the Keroro Platoon by giving Viper a Parents Day message from his parents, revealing he was as weak and idiotic as his son. He revealed that Giroro's father, the Demon Sergeant's friend was also visiting and left with a photo of himself and Giroro's father. He also has a Hitler Mustache and a Pickelhaube.
Dororo's Mother 
A blue Keronian like her son. She may look weak as she is wearing a mask, but she is actually a skilled fighter that can knock down machines with pans.
Karara (カララ) is the daughter of the rich Dobaba family. She is often put in danger until rescued by members of the Keroro Platoon. She appeared with her childhood friend, Taruru until Taruru joined the Garuru Platoon and was replaced by Karara's best friend, Chiroro. She is of light green color with purple headgear, she has blue-green eyes and still has her tadpole tail.
Karara was scheduled by her father to be married against her will, so she left Keron (apparently with Chiroro) and came to Earth. She was temporarily enrolled as the Private Third Class of the Keroro Platoon but causes trouble and is rescued by Tamama from her father who attempted to kill her as punishment for disobeying him. She had gained feelings of love towards Tamama, Dororo and Giroro, and even attempted to marry Kululu. She was kidnapped but was rescued by Dororo and she was gifted with a sword (Chiroro had one too) that when freed from its chain gives her a ninja's clothing along with a white scarf and a silver mask over her eyes. She assists the Keroro Platoon in rescuing Chiroro from Viper until Karara gets taken hostage by Keroro in a Viper Pekopon Suit. While a reformed Viper grabbed Keroro, Dororo destroyed the Pekopon Suit with his attack "Blade of the Phoenix". Karara landed in the arms of Giroro and thus, she fell in love with him while Keroro was arrested. While entertaining the angry 753, Keroro gave advice to Karara and Chiroro, and then they had successfully turned 753 back to normal and thus, she fell in love with Keroro.
Voiced by: Natsuko Kuwatani
Chiroro (チロロ) is the best friend, twin sister to Karara and daughter to Dobaba. She first appears as a fellow ninja with Karara in order to impress Dororo. Her body is light yellow with white headgear, she still has her tadpole tail and has a no entry sign in her belly and forehead.
Chiroro and her sister, Karara, visited Dororo at his dojo in episode 121. She followed and irritated Viper who she thought was a transformed Dororo but she brought back his wonderful memories of his past. When Karara is taken hostage by Cool Big Brother Viper, Chiroro tells Viper how much she cares for Karara and does not want her to get hurt and her words reform Viper and Viper and Dororo work together to destroy Keroro disguised as Viper (for money) and rescue Karara while Viper leaves, promising to see them again.
Dobaba （ドババ） 
Voiced by: Hidekatsu Shibata
The owner of the influential Dobaba Industries (similar to Nishizawa Corporation in Pekopon) and father of Karara and Chiroro. He demanded marriage for Karara who then left for Earth. He hunted her down and prepared to capture her until she escaped with Tamama while Dobaba never appeared again.
Joriri （ジョリリ） 
Voiced by: Junichi Sugawara
Debuts in episode 162. A childhood friend of Keroro, despite the fact that Joriri is clearly much, much older. Joriri is a faded green-grey Keronian with stubble and thinning hair, and prone to propping his foot up on something as he dispenses advice and life lessons from his years of experience. His symbol is a fat stylized capital J. After lending a subtle guiding hand to Chibi Kero and company, he reappears on Earth in the present time (looking exactly the same) and does pretty much the same thing - with the added bonus of freeloading some of the Hinata house's facilities.
Mushishi (ムシシ) 
Voiced by: Shōzō Iizuka
Mushishi is a blue-green elder Keronian who was once a legendary assassin known as "Insect User Mushishi." When he first appears, he pretends to help Keroro with a plan involving insects, but when Dororo arrives at the end of the episode, he reveals that Mushishi is retired and devoted to his hobby to collect insects from around the galaxy, making the platoon realize that they've been had by the old assassin. He carries a bug-catching net and a pouch as well as a green bucket on top of his head that he also keeps bugs in.
Kiruru. (Kiruru Dot) （キルル。） 
Kiruru. was born from Mirara being sealed away with the real Kiruru, making him the Kiruru that was sealed away in the Invasion Timer. He is a tadpole version of his counterpart/father Kiruru but with a dot over the X mark. He is an incomplete version of Kiruru. Instead of absorbing the power of negative thoughts, this Kiruru absorbed the power of hesitation. He was released from the Invasion Timer and befriended the Keroro Platoon. But later, a Keron vessel released swarms of black Kirurus (AKA Kiruru X-52). After Black Kirurus took over, the black Kirurus gave X marks to Natsumi, Tamama and Dororo that turned them evil, while Kiruru. gave triangles to the others. He then takes control of the ship base that controlled the black Kirurus by using the power of hesitation that was massively produced by Keroro and caused them to disappear. Then he turned everyone else back to normal and Kiruru. left with the memory of his friends.
Urere （ウレレ） 
Voiced by: Toshihiko Seki
A highly ranked Keronian soldier who once assisted the Keroro Platoon in conquering Earth. He is purple. His helmet has headphones with a microphone attached. His symbol is an exclamation points, however the one on his chest is rendered upside-down, resembling a tie. He rarely blinks.
Robobo Fukusocho 
A robot substitute for Kululu. He was made from silver metal. He has rectangle-shaped magnet feet and has crescent magnets for hands. His symbol is a black dot with golden tracings.
Rirara （リララ） 
A Keronian kunoichi. She is yellow. She wields a shuriken with a string through it and a summoning scroll. Her helmet has two ribbons. Her symbol is a crescent moon.
Gitata （ギタタ） 
A Keronian guitarist. He is yellow. He plays an electric guitar. He has a mustache in the shape of lightning bolts. His symbol is a red guitar pick.
Hanana （ハナナ） 
Hanana is a kind-hearted flower Keronian. She is a pink Keronian. She has a point above her mouth. She wears a large blue and orange flower on her helmet. Her tadpole tail is a leaf. Her symbol is a flower bud. She has one-sided love for Giruru. Her name trives from the Japanese word Hana, which means Flower.
Gururu （グルル） 
Gururu is a green cow boy Keronian. He has a rope tied from his shoulder to his waist. He wear boots and a hat. His symbol is a Texan star.
Gororo （ゴロロ） 
Gororo is a yellow criminalized Keronian. He has yellow and black side burns. He has a lightning bolt across his chest and eyes. He commonly holds sticks of dynamite and panels of electricity. His symbol is a lightning bolt.
Eruru （エルル） 
Eruru is an orange intelligent female Keronian. She wears glasses and a barrette and commonly carries a pen and notebook. Her symbol is an upward rectangle with a triangle on top.
Captain Jirara （ジララ） 
Appears in episode 189. Cpt Jirara was the leader of the assassin squad that Dororo (then Zeroro) and Zoruru used to be in. His mastery of Keronian Assassin Magic is unparalleled. Went rogue and fled to Earth, seeking out Dororo for one final duel. He is outfitted in a top-to-toe black suit, with armored blade-arms like Zoruru, an assassin mouthpiece (minus the breathing valve in Dororo's old mouthpiece) and a mask with three glowing red eyes and a shuriken over his left eye. His symbol is a shuriken with diamond blades. Jirara's name is from Jiraiya.
Sababa （サババ） 
From episode 220. Sababa settled on Earth during the golden age of Egypt, opening the possibility that the Great Pyramids were created through Keronian technology. Having evolved into a sand-based form after hundreds of years, Sababa has lost the ability to communicate in any coherent language, uttering 'sabarabara' at random, which leads Keroro to dub him Sababa. He wears an old and worn headgear, kohl around his eyes and a pharaoh hook in place of his right hand. His symbol resembles two triangles end-to-end, the lower one twice as large as the upper, which is decorated with two eyes (a possible reference to the familiar eye-on-a-pyramid symbol on the US dollar bill.) The name Sababa comes from sabaku, meaning desert.
Meruru （メルル） 
Debuted on episode 228. Meruru is a member of Keron's official postal service, who comes to Earth to deliver a message for Keroro, which he tries to avoid receiving, thinking that it is a message from head quarters (but turns out to be a letter from Shipepe, Keroro, Giroro and Dororo's long time friend). Meruru is dedicated to her job to the point that she maneuvers her way around all of the platoon's attempts to detain her, including cloaking devices, guns loaded with capsules of sticky gunk, evasive driving and Tamama's farting (which Meruru isn't slightly bothered by and possibly likes). Meruru's symbol is an envelope.
Kikaka （キカカ） 
Debuted on episode 230. An artificially made Keronian which befriended Zeroro/Dororo and soon after Keroro, Giroro & Pururu during their childhood and having a few adventures with them, such as scaring away some bullies. The bullies then mistake Kikaka for the escaped biotech weapon that the army's been searching for and plan to turn him in until the real weapon (a more modern Kiruru) shows itself and Kikaka wards it off. Unfortunately Kikaka then transforms into its true form, a simple doll (it is hinted that Kikaka was one of the first few tests of a much younger Kululu's Nanola)
Officer Bariri （バリリ） 
Voiced by: Ken Narita
Debuted on episode 239. He has a crush on Pururu. He tends to describe his emotions through fruit.
Black Star 
Black Star is the main villain of the manga volume 23. His history is unknown, though its suspected that he is the first attempt of making that Shin Keroro failed. Black Star is very resembling to Shin Keroro except he's mostly black, two ear-like appendages on his head instead of wearing a cap, he wears blue rings all over his body (his appendages, wrists, and neck as his collar). His eyes are colored blood red with black-lined rings around his pupil, his symbol is a black star (hence his name), and its upside down, opposed to Shin Keroro's Keron Star.
Along with the broad cast of alien characters, the series also devotes much attention to the humans that these aliens encounter. The five main members of the Keroro Platoon each have a human partner with whom they share an especially strong personal bond with, which can vary from friendship to familial or romantic feelings. These partners are all teenagers (who in the anime attend Kissho Gakuen, a middle school in Tokyo) and have their own web of correlations.
Hinata Family 
Fuyuki Hinata 
Fuyuki Hinata (日向 冬樹 Hinata Fuyuki ) 12 year old Fuyuki is a stereotypical nerd on the surface, Fuyuki is an oddity even within that scope, as his main interest is in the 'occult' - a term that comprises everything from the best known international mysteries (Stonehenge, the Bermuda Triangle, ghosts, UFOs, etc.) to the obscure, like the Seven School Mysteries (a grab-all term for haunted schoolhouses). A dedicated explorer and adventurer, Fuyuki sadly lacks the athletic skills required. Swimming in particular is a huge handicap for him, specially in contrast with his athletic older sister Natsumi. However, in the rare opportunities Fuyuki gets mad, it is enough to scare both Keroro and even Natsumi into submission. Despite his fascination with the paranormal, he does not have any spiritual sensibility, in contrast with his sister. He is scared of bugs. However, he is a master teller of horror stories. Also his best friend is Sgt. Keroro and was the one who discovered his existence while his sister was waking him up. Though his sister Natsumi was the one who pointed to his hiding spot he is the one who saw the paper peeling first and while staring he captured Natsumi`s attention and she also saw Keroro.
Fuyuki's Keronian partner is Keroro, even though Keroro is supposed to be his enemy. The two do share a natural curiosity (Fuyuki is drawn towards the mysteries of the world, while Keroro is mystified by things most humans consider commonplace), as well as the strongest friendship of the five Keronian/human child pairs. He affectionately calls him 'gunso' or 'gunso-san', meaning 'sergeant'. His appeals to their shared friendship are enough to stop Keroro's plans more than once. Fuyuki is delighted by all the wonders he gets to see with the keronians and jumps feet first in many of their plans.
He created an occult club in his high school, of which only he, Momoka, and Chiruyo are the only members. However, he seems unaware of either Momoka or Chiruyo's crushes on him. The manga details that, at least in its middle school incarnation, Fuyuki's Occult Club was slightly more popular, having at least 3 unnamed members. He possibly has feelings for Alisa Southerncross.
Natsumi Hinata 
Natsumi Hinata (日向 夏美 Hinata Natsumi ) 14 year old Natsumi is the powerful older sister of Fuyuki and the one in charge of the Hinata house when their mother is not home. A minor celebrity of sorts in her own school, she often gets pleas of help from classmates like Yayoi and Satsuki (below), due to her unparalleled physical skills. Feisty and genial, Natsumi is equally capable as a friend, a fighter, and a loving family member. She is very strict on Keroro and always doubts of his intentions, physically abusing him on several occasions (as well as treating him as a house slave), and never calls him by name, only snapping "Boke gaeru" ("stupid frog") at him whenever she has to. Inversely, her infatuation with Saburo proves to be her only weakness on several occasions. Unlike her brother, Natsumi is highly sensitive spiritually, feeling an "oppression" when ghosts are near.
Natsumi's Keronian partner is Giroro, but theirs is the most unofficial as far as relationships go - while both relate to each other almost subliminally (from hot tempers and combative tendencies to a love for roasting sweet potatoes) and are close personally, Natsumi has no idea that Giroro has been infatuated with her since the day she first bested him in strategy and combat: an incident that involved her busting past his boobytraps armed with a leek, and taking him out with a bookbag to the head. In fact it is Keroro that Natsumi is more strongly connected to - their petty rivalries sit high above a deep, underlying current of mutual respect and concern that runs both ways.
Aki Hinata 
Akina "Aki" Hinata, Jr. (日向 秋 Hinata Aki ) is the mother of Fuyuki and Natsumi Hinata and is the head of the family that Keroro lives with. Her exact age is unknown; however, she is believed to be around 35 years old. Whether it is supporting a family of three on her own, making late night runs to the printing press on her motorcycle, or kicking aliens around every few weeks, it is common belief (at least to the Keronians) that Hinata Aki is the strongest woman on Earth. Despite her fear of animals, she feels as though the Keroro Platoon is her own family (due entirely to them being shiny and possibly slimy, as opposed to the furry nature of most animals). As a chief manga editor/designer, she finds the aliens' lifestyle very interesting and often has spells of obsession over them.
While Aki has no official Keronian partner (as none of the adults do), it is Kululu who has taken a special interest in her, to the extent of setting up a spy camera in her shower. Whether this is for the purposes of studying 'the most powerful human on Earth' or for the same reasons anyone would spy on her in the shower remains to be seen.
Akina Hinata 
Akina Hinata, Sr. (日向 秋奈 Hinata Akina ) is the grandmother of Fuyuki and Natsumi. She, like Fuyuki, believes in paranormal activity in the form of forest spirits. She is aware of the existence of Keroro and the aliens.
Haru Hinata 
Haru Hinata (日向 春 Hinata Haru ) is Aki's husband and Fuyuki and Natsumi's father. He is never fully shown and is rarely mentioned in the anime. He is known to be constantly traveling the world, and it is unknown if he actually knows about the Keronians living in his house or about aliens at all. His own interest in mysteries around the world, like the Easter Island's Moais, seemed to inspire Fuyuki's occult obsession
Nishizawa Family 
Momoka Nishizawa 
Momoka Nishizawa (西澤 桃華 Nishizawa Momoka ) is a multi-billionaire 12 year old and lover and classmate of Fuyuki. She has a split personality, indicated in the anime by her Fawcett curls turning into spikes. While being a well-connected heiress who lives in an expansive mansion, Momoka views her extravagant lifestyle as completely commonplace and acts in a refined and timid manner for most of the time. Her other personality is much more aggressive and violent, emphasized by the aforementioned hairstyle and a rougher voice.
Despite being outgoing in everything else, Momoka is really shy when it comes to Fuyuki, and she is unable to confess her feelings to him. That drives her to concoct the most crazy (and expensive) plans to gain Fuyuki's affection, to be near him or to make him happy. As head of the Nishizawa Peach Group or NPG, there is very little that is beyond her capability, even if the final bill is truly astronomical. Though she has a private army of guards devoted to her safety and happiness and the highly advanced technology of NPG at her disposal, often her plans need the more advanced keronian technology or the collaboration of the platoon themselves, and she hires them for an enormous amount of money.
Momoka's Keronian partner is Tamama. It is mentioned in the anime that she found Tamama "on the street" and took him in, pampering him like a celebrity chihuahua (and leaving his platoonmates very jealous indeed), and the fact that both of them have a split personality is literally an astronomical coincidence.
Paul Moriyama 
Paul Moriyama (ポール森山 Pōru Moriyama ) is the butler of Momoka. As Momoka's butler and full-time guardian, Paul does everything in his power to make her happy and protect her. According to flashbacks, a duel with Momoka's father Bayo Nishizawa resulted in Paul's current place as Momoka's caretaker. Tamama relates to him as a fellow martial artist, despite Paul being in a completely different league - not even the Tamama Impact (Tamama crazy breath) can take down Paul, a notorious street fighter in his prime. Flashbacks to his youth reveal the young Paul to be based on Ken Masters of Street Fighter fame. Paul is most famously known as "The Mustache".
Baio Nishizawa 
Baio Nishizawa (西澤 梅夫 Nishizawa Baiō ) is the father of Momoka and head of the world superpower-like Nishizawa corporation, of which Momoka's already-powerful Nishizawa Peach Group is a mere subsidiary. Baio trusts his daughter's happiness due to him living out of state, usually in a castle by a lake in Scotland. He tries to meet with his daughter, but he rarely accomplishes it. He is aware of the existence of the Keroro platoon.
Oka Nishizawa 
Voiced by: Yoshiko Sakakibara
Oka Nishizawa (西澤 桜華 Nishizawa Ōka ) is Momoka's mother and Baio's wife. She has amazing fighting skills. She encountered Baio as her finalist opponent during a martial arts tournament. After the battle, the two fell in love, married, and had Momoka. When Momoka matured, Ōka had left the mansion to Momoka. She returns during Mother's Day and her abilities were tested. In a later episode, Oka was capable of defeating Giroro and Dororo plus Kululu's battery of missiles unarmed, and only her husband proved to be a strong enough rival for her.
Much like her daughter, Ōka has both a violent and gentle personality. Her gentle personality occurs when she is treated with love and she loses her violent outlook.
Oka's design is modelled after Chun Li of Street fighter fame, but she always shows up first in a thick brown cloak over her entire body, tossing aside anything that gets in her way, reminiscent of Kenshiro's return to civilisation in Fist of the North Star.
Mutsumi Houjou 
Voiced by: Akira Ishida (Japanese), Joel McDonald (English)
Mutsumi Houjou (北城 睦実 Hōjō Mutsumi ) or Saburo is 14 and is the eldest of the five main children. As a student, he skips class continuously and has a reputation for being somewhat of a trouble child. In truth, he is a mature, if mysterious, young man who has a hard time adjusting with his classmates because of his excellence in almost every subject (including academics and athletics). He hosts a popular late-night radio program which Natsumi compulsively listens to. Mutsumi is the least active main character of the series, but plays a significant role as Kululu's partner/friend, Natsumi's unrequited crush,giroro's romantic rival, and probably the most intelligent human character.
Through a chance encounter with Kululu at school, Mutsumi not only met and rescued him from a battle gone awry, but also acquired his trademark weapon: a virtual reality pen created by Kululu that can create anything on any solid surface, exclusively for himself. In the anime he uses the name Saburo (サブロー Saburō ) in public life, and uses "623" only in his radio show; his true identity is kept secret to the public. Unlike the other four Keronian/human child pairs, his relationship with Kululu is particularly distant, though they understand each other perfectly - Kululu may consider Mutsumi his only intellectual equal and vice versa, but he lives in his lab beneath the Hinata house instead of Mutsumi's home, thus shrouding Mutsumi's personal life in even more secrecy. However, Kululu seems aware of the fact that Mutsumi and Saburo are the same person. Mutsumi's name comes from a Japanese wordplay (Saburo means 326, and Mutsumi means 623).
Mutsumi had previously appeared as a radio talk show for teens host in the anime Seven of Seven.
Koyuki Azumaya 
Koyuki Azumaya (東谷 小雪 Azumaya Koyuki ) is a kunoichi who enters Natsumi's school as a transfer student. Drawn to Natsumi by what she only refers to as a "familiar scent", the two girls soon become best friends. While she does wear her civilian clothing when in public, she always keeps on her ninja uniform in case of an emergency. Her skills as a civilian and a ninja are exceptionally outstanding and her athletic ability even rivals that of Natsumi, making her one of the most physically powerful characters of the series. Despite having amazing powers and a troubled and strict past, Koyuki is very carefree, optimistic, and eccentric, but believes in what is right and protects her friends with all her might. Unfortunately, her tendency to utilize her ninjitsu maneuvers to accomplish the most mundane of tasks often draws much unwanted attention.
Koyuki's Keronian partner is Dororo. She finds and rescues a stranded Zeroro (now Dororo) from a bear trap and teaches him the ways of the ninja, which unwittingly leads to the dissolving of her ninja clan, giving her a chance at a real life in the city. Sharing many interests and the same positive attitude, Dororo and Koyuki have the most stable and cohesive relationship of the five Keronian/human child pairs. He trusts Natsumi to teach Koyuki to live a modern life.
Koyuki has a crush on Natsumi, though that is more evident in the manga than in the anime.She has a small but growing crush but because she isn't used to people she may not know what a 'crush' actually means or is and what 'personal space' is.
Chiruyo Tsukigami 
Chiruyo Tsukigami (月神 散世 Tsukigami Chiruyo ) is an intelligent and meticulous class-mate of Fuyuki. She is part of the Kishou Gakuen Shinbunbu or KGS, the school news club, and started out observing Keroro and Fuyuki's activities from a comfortable distance. Like Momoka, she has a crush on Fuyuki and is equally shy about her feelings toward him. She's obsessed with writing down in her notebooks all her observations about Fuyuki. She is 12 years old.
Chiruyo later befriends Pururu, who helped her get closer to Fuyuki. Though they do not live together, they share a good friendship.
Ms. Furbottom is Giroro's pet whitish pink cat that he first found in the rain. She accompanies Giroro in his tent. She loves Giroro from then on and rivals Natsumi because of it. She sometimes unknowingly turns into human using one of Kululu's inventions. She quickly becomes Giroro's friend and became his pet after the Garuru Platoon's departure. Her human form bears a distinct resemblance to Cammy White of Street Fighter fame.
Melody Honey 
Melody Honey is a famous pop star from America that appears in the most unlikely places. She likes all kinds of jokes, even the boring ones. Previously appeared in Seven of Seven and Arcade Gamer Fubuki, also by Mine Yoshizaki.
Voiced by: Chie Matsuura (Japanese), Trina Nishimura (English)
The Ghost (お観世 Omiyo ) of the Hinata household, also known as Spirit-chan (幽霊ちゃん Yūrei-chan ), is a ghost living in Keroro's room. Aki bought the house for a low price because of that. She was imprisoned because she hid a Keronian (thought to have been a Kappa) with similar characteristic as Keroro. She was later rescued by that Keronian and died when she was 90 years old. Much like Dororo, Omiyo does not like to be forgotten by those around her (she even goes into Dororo's 'trauma switch' pose in episode 6), and her attempts at grabbing attention finally lead up to an aggressive manifestation in episode 46, where her true story is revealed. In volume 14 (and anime episode 178) she introduced herself as "Omiyo" to Momoka after she turned herself into a ghost to get closer to Fuyuki.
Yayoi Shimotsuki and Satsuki Shiwasu 
Yayoi Shimotsuki (霜月 弥生 Shimotsuki Yayoi ) and Satsuki Shiwasu (師走 五月 Shiwasu Satsuki ) are two of Natsumi's classmates, her best friends long before Koyuki's debut; this relationship has led them to come very close indeed to discovering the Keroro platoon's existence on several occasions. Yayoi leads the school drama club with the passion of a thespian; and Satsuki, the more physically adept of the two, is in the swim team. They seek Natsumi's assistance in assorted school assignments, from stage presentations to sporting events, on a regular basis. In one episode Yayoi and Satsuki get to meet Keroro. Yayoi gets a little crush on Giroro for one episode. And there are some signs in episode 2, 8, and 25 that Yayoi and Satsuki have a crush on Natsumi, and on episode 8 when Sgt. Major Kululu turned Aki into a teenager. Yayoi and Satsuki thought Aki was hot thinking she was Fuyuki even though she had boobs.
Masayoshi Yoshiokadaira 
Masayoshi Yoshiokadaira is one of the hundreds of faceless black ops agents in the Nishizawa Peach Group. Only two things distinguish Masayoshi Yoshiokadaira from them: his awkwardly long name, and his tendency to be thrust into prominent roles during Momoka's get-close-to-Fuyuki plans, such as 'eloping' with her in episode 98. It's not until episode 248 that Yoshiokadaira gets a storyline in his name.
In Keroro's childhood memories, the Nontolmas (ノントルマ Nontoruma ) are what Keroro's grandfather used to refer to earthlings. They were actually a race of beings that live at the bottom of the ocean, building an undersea empire long before humans evolved. The Keroro Platoon met them when they were in the ocean. They consist of multiple Anomalocaris, an ancient White Shark (Possibly Megalodon) with red eyes within its mouth and a mermaid who Fuyuki befriended.
The Narrator 
Despite his voice being heard in every episode, it is not until episode 40 that the Narrator appears as an on-screen character (although the recurring breaking of the fourth wall means that the regular characters already recognise him as such.) He is dressed as a Kuroko or kabuki stagehand, wearing a ninja-esque outfit with a black veil instead of a mask (made famous most notably by the referee in the video game Samurai Shodown) but with an additional capital N emblazoned on the veil. His appearances on the show may be few and far between, but he gains a lot more exposure upon appearing in the 8th title sequence.
Zeroyasha was shown in episode 98 and 68 in Koyuki Azumaya's memories. He is a ninja hound and a rival/friend of Dororo. In the anime, he was the one who found Dororo(Zeroro) trapped in the woods. It is seen that he is incredibly smart and athletic, being able to outwit the Keroro Platoon (Minus Dororo and Kululu) and play catch with Dororo for a week straight. It is not stated, though, that he is either Mukuro's, Koyuki's, or lives by himself since he is considered on the same level as them. But it mostly leans to being Koyuki's.
Angol Asami 
Voiced by: Mamiko Noto (Japanese), Laura Bailey (English)
Angol Asami (麻美) is a cousin of the dreams, martial arts champion. She was turned into a "bad" girl when she got in a fight to protect her friends. Asami was committing crimes and Tamama was quick to say that it was Mois. So Mois could confront Asami, Kululu made a projection device that made every one look like Asami. Angol Mois based her human form on Asami. Mois was told by her father to find the most powerful Pekoponian and make herself look like that Pekoponian. Mois did, and so now she can transform and look like Asami.
The Angol 
The Angols are a group of alien race whose main purpose is to destroy a planet as their tradition to their race.
Angol Mois 
"July 1999. The Queen of Terror descends from the sky and Angolmois awakens."
Angol Mois is the "Queen of Terror", who is ditzy and insecure as a result of her impact from space. She was sent to planet Earth to arrive in July 1999 for Earth's destruction, as predicted by Nostradamus, under orders from her father. She states that during her first appearance she told Nostradamus to deliver a message to the humans warning them of her arrival. In the anime( episode 7), she arrives 500 years too early and takes a nap in orbit, until she wakes up in 2004, 5 years too late (2009 in the English dub). In the manga, she lands near Fuyuki, while in the anime, she lands on Giroro's tent (and on top of Giroro, who was inside). In both, she is taken into the Hinatas' home, where she is nursed back to health by Natsumi. When she wakes up, she reveals her true form and starts to destroy the Earth, until Keroro, who arrives later, is persuaded by Fuyuki (who reminds him that if Mois destroys Earth, there would be no more Gundam models) to stop Mois.
Although the Lord of Terror, she is anything but terrifying. She's sweet, clumsy, and peppy, with no malice whatsoever but can be scary when she gets her Lucifer Spear out. The Lucifer Spear, which she only can use while in her true form, is a terrible weapon that could, at its fullest power, completely destroy Earth. She usually uses only an infinitesimal part of its power to destroy things. The Lucifer Spear also doubles as a cell phone, which Mois keeps in her pocket. The weakness of the Angol is a mineral called Angolnite, that neutralizes her powers. She keeps a crystal of Angolnite hidden in her room just in case.
She is close friends with Keroro, since the sergeant used to play with her when she was a child. She calls Keroro oji-sama, which means, roughly, "uncle". She is in love with him and dreams of being his girlfriend, though Keroro seems oblivious to it. Tamama, however, considers her his rival and often competes with her for Keroro's attention (and affection), though most of the time Mois don't ever realizes she's competing. Often, also, her pure heart puts Tamama to shame without even realizing it, an unconscious weapon that also works against the cynical Kululu. Her main goal is to make Keroro happy, something Keroro takes sometimes advantage of to make her do his cleaning work in his place, and she also works as part of the platoon as communication's officer and overall helper. She lives in a room at the platoon's underground base.
In her true Angol form, she is a pale gray-haired, brown-eyed girl who wears a purple, yellow and white costume. However, to blend in with the Earth people, Mois transforms into a tanned, bleached-blonde teenager (kogal) who is always seen in a school uniform and loose socks. She got her Earth look from when she first arrived, not long before she met the Hinatas. In the manga, her father had encouraged her to see only herself as important as this frame of mind was needed to become an effective planet destroyer. Thus, she chose the form of a Japanese school girl she saw ending a friendship with another girl for her own benefit. In the anime, she chose the form of a girl who was fighting for her friends, thus becoming her "inspiration."
Her transformation sequences, stylized costume, and related accessories may make her a parody of the "magical girl" genre. As an added note, Mois's Pekopon-form wears a hairclip explicitly in the shape of the Science Patrol's meteor-mark in the anime (while Asami, the girl whose form/soul she "borrowed", has an Ultra Garrison-mark hairclip). Her name is frequently used in puns on the Japanese phrase moe-moe, which usually refers to a cute girl who appeals to older members of the audience.
In the English manga, her name is "Angol Moa".In the English anime, her lucifer spear is called "Hellmageddon", an amalgamation of the words "hell" and "armageddon" meaning doomsday.
--Piratefish11-- She's real! I don't know if you know this, but there is an actual "Angol Mois." I recently read a book about the end of the world, and it talked of an "King of Terror" known as "Angol Mois." I was amazed to discover this fact. I had always thought Sgt. Frog made her up. How's that?
King of Terror 
Voiced by: Nobuaki Kakuda (Japanese), Cole Brown (English)
The father of Mois. Like his daughter, he is very kind hearted until he is called to destroy Earth.
Angol Tia 
Although she is not an heir of King of Terror, she got the power to punish planets. At the end of Manga Volume 13, it was revealed that Mois's mother was the main reason why dinosaurs became extinct on Earth. In Volume 14 her name was revealed as Tia.
Angol Fear 
In the game Soulcalibur IV a character named Angol Fear appears, designed by the same creator of Sgt. Frog and is revealed to be Angol Mois's cousin. Fear plays a similar role to Mois as a judge over the earth and executor of its people. Fear uses a black version of Mois' Lucifer Spear and appears in Chapter 148 of the manga to confront Mois over her constant failure to destroy Earth.
Other Aliens 
Space deputy Kogoro 
Kogoro is the childhood friend of Keroro and a space deputy. He loves colored boxes (and collects them). His height is 177 cm and his weight is 77 kg. Kogoro seems to be always energetic, the same vitriol-laden smile affixed on his face while he laughs and stares into space (even when he's been knocked unconscious - he does stop laughing though), although only his younger sister Lavie can actually read the feelings of Kogoro. He and his sister first appear in volume 6, chapter 46, of the manga and the 24th episode of the anime.
He is likely a parody of the character Gavan from the Metal Hero Series Space Sheriff Gavan. It only takes him a splitsecond (0.003 nanoseconds in the anime) to transform with his suit (This also is a parody of the length of time it takes Gavan to transform, although Kogoro's transformation merely requires him putting on a helmet).
Kogoro's sweet natured younger sister who wears rabbit ears. Because Kogoro never gets any work, she supports by working various part-time jobs. There is a character from the anime Mado King Granzort with the same name and is a long ears race person (presuming that she's kind of a reference to him) who is a primary character in the Granzort Series. Apologising for her brother's behavior (sometimes unnecessarily) has become a recurring habit of hers. Much like her brother Kogoro, Lavie is also a parody of the character Annie, a female partner of the eponymous character in Space Sheriff Shaider.
In the English manga, her name is "Rabbie".
Voiced by: Juri Ihata (Japanese), Caitlin Glass (English)
Sumomo is a member of the Axolotl, a race based on newts in the same way the Keronians are based on frogs. In the manga, a young girl finds Sumomo. Sumomo immediatally falls in love with Fuyuki Hinata and tries to "kiss" him by wrapping her tongue around him, because she does not know Earth's customs. The young girl's father finds Sumomo, and like Keroro, was converted into a comic book character.
However, in the anime, Sumomo is a pop singer of space. She can even change her form into a hot chick of 400 alien species including human. Like the comic book, she does not know Earth's customs, but Natsumi and Fuyuki help her. Sumomo's song at the end of the episode is "Shoot Stars in the Face".
Alisa Southerncross 
Voiced by: Akiko Yajima
Alisa is an undead being/toy doll who feasts on UMA alien to gain life energy. her adoptive father Nebula, was the alien which tried to give the life energy by absorbing it for what they call "dark race", the "prey" that they captured would usually being locked in a box. The first time when this character was seen in episode 133, which she captured the Keroro Platoon, and "kidnapped" Fuyuki, but befriends with Keroro and the others later. Her second appearance was in episode 141, and appeared in episode 149. She was being shown on the Keroro Movie 5, Keroro Unlimited Transformation, Miracle of the Island of Time.
A yellow space plant that loves humidity. It loves to absorb the humidity of any super wet objects (or aliens). Keroro is always sucked by Nyororos every time he gets super humid. However, some aliens use Nyororo as a reducing-weight tool (Putata of the Shurara Corps and Kululu are known to rear their own Nyororo for their own purposes).
Nyororo Ω 
A brown monster with many tentacles. The Garuru Platoon used them as weapons in the invasion of Earth. This kind of Nyororo doesn't seem to have the ability to absorb humidity.
Space Pizza FX 
It reproduces by releasing crumbs that grow into mini-creatures about 1 foot wide (juvenile form) overnight.
A yellow octopus that has a big eye and big lips. It is used in the show to save Momoka from drowning. Momoka believes that the lifeopus deposited an egg or eggs inside of her, and the Narrator confirms this.
it appears in the next episode as being caught off the coastline by fishermen.
Space Cerberus 
A giant monster with 3 heads and the ability to recover itself. Its liver is said to be able to heal anyone from any diseases. Giroro once fought one to get its liver so he can save Natsumi.
- Viper is the name claimed by all members of the immediate and extended Viper family and friends. Each Viper character, upon entering the scene, will explain his or her relationship to the previous Viper. The first Viper fought the Keroro Platoon per the age old "snake versus frog" battle and thought it was his right to abuse the weaker Keronian. After all, snakes often ate frogs as part of their diet. However, with his defeat, each subsequent Viper has been on a vendetta against the Keroro Platoon. The exception is Viper Mother, who on Mother's Day, was only traveling to earth to visit her son, Viper.
Each member of the Viper Family is outfitted with a red jumpsuit, black belt, and right hand blaster. Variations of Viper and the Viper family can be seen in the Viper Wedding, Episode 74 "Surprising - Keroro Special Version, gero gero 30 minutes, 15 stories".
Their appearances(red jumpsuit, hand blaster, and cigarette) is parody of Cobra (manga).
Viper (original) 
The first Viper who fights the Keroro Platoon because of a war between the Keronians and the Vipers, and was defeated by a technique used by Dororo. He reappears in Episode 121, where he appears as a cyborg who takes revenge on Dororo, but ends up capturing Chiroro and hides in Alien Street from the Space Police and the Keroro Plantoon. To keep himself from being spotted, he disguises himself as a chef in a ramen stand. When Keroro disguises himself as Viper and captures Karara in an effort to earn money, Viper takes off his disguise and attempts to defeat the fake Viper, proving that he does have some good in him. Viper's cyborg appearance is very reminiscent of Freeza, of Dragonball Z fame, when he became Mecha Freeza. His left half has been completely demolished and replaced with mechanical parts, his left eye is green and has a yellow scope as its pupil, a black tube appears on his head and leads to the back of his head, and the buster arm he had before has now been replaced with a mechanical claw. He has a son that was taken away by his ex-wife who he taught a technique on how to make the Tokyo Tower out of cherry stems.
Cool Big Brother Viper 
The older brother of Viper. He kidnapped the Keroro Platoon and was defeated by Dororo. He soon enlarged himself but he was scared off by a larger Keroro due to the Flash Spoon.
Viper (relative) 
One of the relatives of the defeated Viper. He formed a group of Vipers and stole a ring which is the clue of treasure. He was later captured by Jessica.
Viper (Former Pirate) 
A kind Viper that Keroro, Giroro and Zeroro met when they were young. He gave clues of the hidden treasure in a deserted planet to Keroro.
3M and R Grey 
Known as the Sentimental Consultants, they are the MCs of a popular show. 3M is the tall one with a head shaped like a chestnut; R Grey is the short one, looking just like the stereotypical Roswell alien (hence the 'Grey'). They once visited the Earth, but they were soon attacked by Giroro, who mistook them as the impostors.
Wettle King 
Voiced by: Daiki Nakamura
Created by Keroro upon learning that Natsumi was afraid of slugs, Wettle King is a common slug evolved by Kululu into a humanoid being who resembles a green Ultraman with tiny eyes and feelers on his head. Though he has 1000 times the strength of a normal slug, he was still quite weak, but his attacks worked against Natsumi because she was so much revolted by his viscosity. Fuyuki, however, was able to defeat him with a finger. Unless he's in an ambiance with very high humidity, he can only fight for 4 minutes and 44 seconds before he has to recharge himself with water. Despite Keroro's intentions, Wettle King's spirit of righteousness forbade him from harming Natsumi, and he flew off into deep space in the end to find someplace where he could be useful, until his powers were needed once again.
In episode 215, Wettle King returns with the additional ability to disguise himself as Tohru Uetsu, a motorcycle-riding, smooth-talking (and incredibly clumsy) photojournalist, along with playing a trumpet during his entrance scene, he is reminiscent of Hayato Icimonji, the second Kamen Rider and his costume was a parody to Ichiro of Kikaider 01.
Wettle King Clones 
In episode 215, Keroro creates a new batch of seven Wettol Kings, easily differentiated from the original by their differently-colored gloves and boots, along with matching scarves, a deliberate parody of the Shocker Riders from Kamen Rider. Sent to attack Natsumi, the clones wind up facing off with the original Wettle King, who awakens their righteous spirits and turns them into his allies. Together, the eight Wettle Kings are a deliberate send-up of the recent Ultraman movie, '8 Ultra Brothers'.
Jessica Harpie 
A Space Policewoman. As an officer of the galactic version of Interpol, she is highly skilled and outfitted with advanced weapons and equipment. With the help of Keroro Platoon, she was able to capture the wanted Viper.
Voiced by: Miyuko Omimura (Japanese), Maxey Whitehead (English)
One of the Space Policewomen. She always shows up just before Keroro Platoon successfully conquered Earth every time. She can travel anywhere instantaneously through the use of space portals. When she's coming out of the portal, she gets out very slow usually singing "Heave ho, Poyon Go" . She ends most of her sentences with "poyo." It's revealed that Poyan is her subordinate.
Voiced by: Asuka Tanii One of the Space Policewomen. She is currently stationed at the Aliens Street to prevent any human realizing the existence of aliens.
A scout from the moonlight special squad, an ally of Keron. She tested Koyuki and asked her if she would join the moonlight squad. She decided otherwise when she found out that Koyuki had a best friend on Earth.
A giant crocodilian like animal that can feed itself by eating the banana from the banana trees grown on its back. It is also one of the biggest fears of Keroro, as he can't resist stepping on the banana peel after a bananawani has eaten a banana. Wani translates to crocodile.
Dance Man (ダンス☆マン) 
Dance Master (ダソヌ☆マソ Dasonu Maso ) 
An impostor of Dance Man who claims that the dance man is an imposter of him, he is a popular singer who wears an afro too. While his fame is derived entirely from the fact that the katakana for his name is easily confused with Dance Man's, and his act consists entirely of telling the truths about himself and his lifestyle (and not much actual singing), he is still considered a bona fide intergalactic idol by Keroro and company. The afro of Dance Master can absorb and reflect any attacks. Whenever the concert ticket of Dance Master is torn, Dansou Maso himself will be summoned. He can also fire laser beam from his glasses to give an afro hairstyle to whomever it hits. The only way to damage him is to use scissors to cut his afro or sing better than he can.
Dasonu Mari (ダソヌ☆マリ) 
Debuts in episode 114. The younger sister of Dasonu Maso. She learnt that Keroro Platoon is a team full of comedians from Dasonu Maso so she went to observe Keroro Platoon. Keroro, who was trying to prove her wrong, started invasion immediately, but they all failed in comedic ways.
At the end of episode 114, Dasonu Maso turns her long blond hair into a black heart-shaped afro, which she keeps for all her future appearances.
From episode 132. Cheuton is one of five identical trainee assassins, from an alien race based on bees just as Keronians are based on frogs. They take orders from a wall-mounted falcon symbol with a blinking red light - this, combined with their appearance, references the evil organisation Shocker and the Shocker Riders from Kamen Rider.
Prisoner #303 
An evil alien that likes to possess the others body and eat as much as he can. According to the Space Law, the possessed one is responsible for paying the economical loss caused by 303.
Events Alien 
With a head shaped like a lava lamp and a two-colored skin tone split down the middle, these members of the Events Alien race are commonly seen in charge of galactic television stations.
Space Kumiko Watanabe 
Debuts in episode 66. The catgirl-looking voice actress of Space Captain Geroro (galactic dub), named after the real life voice actress for Keroro Gunso. She was often seen in scenes with a lot of aliens.
Super Dali 
A kind of tiny humanoid invader. Super Dali love to invade unhealthy teeth and build a headquarters on them. Keroro's molar was once invaded by Super Dali. In episode 10 the Super Dali are led by a Dali Queen, 100 times taller than her minions, and resembling the Succubus from Warcraft 3.
In Episode 218, Dasonu*Maso mutates a colony of Super Dali into the afro-coifed Super Daso, making them powerful enough to not only beat the Keroro Platoon, but take them prisoner.
ZZZ (Lt. Zezeze Tototoso) 
A gigantic invader which is 2000 m tall. Any planets targeted by him have no chances to survive from his mad collecting habit. As he was moving to Earth, all aliens except Keroro Platoon left the Earth. Keroro Platoon attempted to fight him but got beaten and were forced to return to the Earth. At the same time, Angol Moa found an ancient weapon in Aliens Street. Keroro Platoon, with their human partners and some aliens led by the Space Police used it to fight ZZZ but failed to damage him even with the attack from Garuru's Platoon. Angol Moa dropped a space banana peel and Keroro went to step on it and the peel flew to ZZZ's feet. ZZZ slipped and was defeated when he flew to the Sun caused by the slip.
Keroro Gunso the Super Movie 
Voiced by: Yui Aragaki
Mirara is a Keronian who sealed Kiruru. She was released, along with Kiruru, when Keroro and Fuyuki breaks the orange crystal where they were sealed in. She is a pink Keronian tadpole with a brace and bell holding two locks of her hair and wears a pink robe with a red O symbol. She uses a giant mecha similar to the three in Episode 28 to travel and she can control O marks just as Kiruru can control X marks. After replacing Keroro and Fuyuki's X marks with O marks, she turns into a key. She and Kiruru were sealed away when Keroro and Fuyuki pressed her into a slot in a giant orange crystal in the heart of Kiruru's pillar. The capturer of Kiruru. She can absorb positive energy and turns into a key that can seal Kiruru away.
Voiced by: Ogi Yahagi
The main villain of the first movie who was sealed away with Mirara in tower form. Kiruru is a Keronian war machine that went on an uncontrollable rampage millions of years ago but was sealed away in an orange crystal by Mirara. He feeds on negative energy. His design is a white Keronian that wears golden bracelets and has a Keronian soldier helmet-like head with a black bottom jaw and belly. He has a red X on his forehead, much like the placement of Keronian emblems on their hats. He attacks by flying through the air and giving people an X mark on their body. This allows them to telepathically communicate and give more X's, but Kiruru powers himself using their negative emotions and the victims eventually only think about negative thoughts. Then, once he obtains enough power, he transforms into a more powerful form, which looks like a large beast. In this form he has no legs, instead he has a long, thick tail and moves around with his two hands. This form and the next are impervious to damage and generate a strong paperlike substance from its limbs to cover up large expanses of land. After collecting even more negative energy, Kiruru transforms into a tower and begins cloning his first form. The clones fly in a X formation until they attack, when they swarm around their unfortunate victim. He was defeated when the Hinata's and the Keroro Platoon's friendship removed their X's and Fuyuki and Keroro placed Mirara into the orange crystal, sealing away Kiruru once again.
Keroro Gunso the Super Movie 2: The Deep Sea Princess 
Left behind in their undersea home by an ancient Maron alien army after an unsuccessful invasion, Meru and Maru appear to be sea lizard-based in the same way the Keronians are based on frogs. They appear again in vol. 20 of the manga, which also features another known Maronian, Miroro.
Voiced by: Hoko Kuwashima
Meru is prince of the Deep Sea, and the main antagonist of the movie. He is destined to marry Natsumi Hinata, whom he claims to be his princess. Growing up with no memories of his childhood, family, home, nor race, he and Maru (マール Maaru ) as his servant develops a second childhood, filled with loneliness. One night, Meru and Natsumi the kingdom's sacred weapon to uphold their titles with the Mer Ball, a weapon that resembles the Kero Ball. Kululu then reveals that Meru and Maru came from Maron, a planet of water, and Meru would eventually flood Pekopon to become his world. They were saved by the Keroro Platoon together with Fuyuki and Momoka. With the corrupted Mer Ball forever out of the wrong hands, Meru and Maru ultimately fall in love and wish their friends farewell as they start a new life on Maron as prince and princess.
Voiced by: Nozomi Tsuji Maru is a "childhood friend" and assistant of Meru. They have been together for as long as they can remember. Despite she's playful and sometimes clumsy, she is kind, proud, and strict just like Meru but only sometimes. She is also a very skilled fighter, who defeated Giroro quickly by using a Mer ball (scythe form).
Groups of giant creatures that were created from the Mer Ball by Meru. They were used to capture Natsumi and also to guard the palace. When the platoon went to get Natsumi back, they were held back by the Nightmares, but they managed to defeat them.
Chibi Kero: Secret of the Kero Ball 
A young male Keronian who is with Kululu when he finds the Kero Ball outside of Chibi Kero's hideout. He is a grayish-purple in color, wears a periwinkle hat, and has a bandage over his nose. Shupepe wears blue-rimmed headphones similar to those that Kululu wears as an adult. His symbol is a bandage that is blue on his belly and white on his hat. He is voiced by an uncredited child fan.
A young female Keronian who is also with Kululu when he finds the Kero Ball. She is pale orange in color, wears a pink hat with a red bow on the right side. Her symbol is a bow that is orange on her belly and light pink on her hat. She and Shupepe leave Kululu behind when he becomes more interested in the Kero Ball. She is voiced by an uncredited child fan.
Keroro Gunso the Super Movie 3: Keroro Vs. Keroro: Great Duel in the Sky 
Voiced by: Yui Horie
Appears in the third movie. She was released (accidentally, by Keroro) from imprisonment in a crystal chamber deep in the ruins of Macchupicchu in Peru. Dark Keroro recruits her into his fledgling platoon, where she turns system operator of his massive battlecruiser. Sharing Pururu and Sumomo's ability to disguise herself as a human, she assumes the name Nazca and lures Fuyuki into a trap. At the end of the movie, Miruru is revealed to have the same role as Mirara in the first movie, intended this time for sealing Dark Keroro.
Dark Keroro 
Voiced by: Kumiko Watanabe
The main villain of the third movie. Looking almost exactly like Keroro, he is in fact a newly-uncovered Kiruru in the mountaintop city of MacchuPicchu in Peru, grown from a sample of Keroro's DNA taken off the Kero Ball (during the same occasion where Miruru awakened). He leads the other Keronian manifestations, Shivava and Doruru.
At the end of the film, Miruru sacrifices herself to seal the Kiruru half of Dark Keroro, putting an end to his malevolent intentions. Rid of his violent ambitions, Dark Keroro makes up with his counterpart and heads off into space to try to conquer a different planet. However, his plans are thwarted by alien look alikes of Fuyuki and Natsumi in an intentional parody of the start of the series.
Voiced by: Minami Takayama
Shivava is a stuck up Keronian who thinks of himself as the "main character." He left Keron because it was "too small" for him and joined forces with Dark Keroro and Doruru. He is rivaled with Tamama, who cannot stand him, but ultimately loses to him and Momoka when they gang up on him.
Voiced by: Rū Ohshiba
Doruru is a member of Dark Keroro's Keronian manifestation empire, alongside Dark Keroro and Shivava. Giroro remembers him as one of his old brigade's fiercest soldiers. In the end, Doruru is defeated with Giroro and Natsumi's combined efforts.
Keroro Gunso the Super Movie 4: Gekishin Dragon Warriors 
Voiced by: Nana Mizuki
Félicia Shion du Dracoon, called Shion by Momoka and her friends, initially felt alone for much of her life. Through an heirloom she inherited when her parents died, Shion learned of the Earth Dragon prophecy. She sets the events of the movie in motion by turning Tamama, Giroro, Kululu, and Dororo into dragons as part of a warrior program. Eventually learning a secret in the spellbook she used, and learning that she is not alone, she helped to stop the Earth Dragon.
Voiced by: Ikue Ōtani
The Earth Dragon who awakens once every 5000 years to recreate the world, it was eventually held back by the Keroro Platoon, who were then turned to dragons by Shion and made to its servants. Sion eventually reasoned with it, giving it the name Terara. Terara transferred all of it energy back to Earth. A piece of the Earth Dragon is eventually born at the end of the movie, it is Terara in a Keronian tadpole form.
Keroro Gunso the Super Movie 5: Creation! Ultimate Keroro, Wonder Space-Time Island 
Io is one of the main characters in Keroro Gunso the Super Movie 5. He is Rana's brother and a Mana in human form.
Rana is also of the main characters in Keroro Gunso the Super Movie 5. She is Io's sister and also a Mana in human form.
Mana are magical spirits that lived for many years and also debuted in the Fifth Movie. Their appearances are small, glowing, roundish like orb creatures that come in many colors with blue pupils. Even though they have no mouth, they are usually heard saying mana. Io and Rana are also mana only in human form. Manas also had the power to seal Akuaku.
Akuaku is the main villain of the fifth movie and an evil spirit that loves to play pranks. When a diver managed to take away a moai statue that was keeping him inside, he escaped. He managed to defeat Alisa and her father easily. After a tough battle with Keroro and his platoon, he manages to steal Kururu's knowledge, Tamama's power, Dororo's skills and Giroro's determination by swallowing them, absorbing their energy and then spitting them out. He doesn't attack when it is raining because he is afraid of water. When Keroro is transformed into a Makemake creature, he is surprisingly beaten up by Keroro but comes back to take him down. As he is about to defeat Keroro, he is grabbed by him and purified by the spirits of the moai statues. However, he returns in a smaller blob form but he is soon eaten by Alisa's father.
- Sgt. Frog Volume 1 Encounter III: Me Myself and Momoka
- Sgt. Frog Volume 2 Encounter XIII: The Sergeant Reaches the Critical Point
- Keroro Gunso season 3 episode 124 "Keroro Natsu no Takaramono de Arimasu"
- Keroro Gunso manga volume 2 chapter 11
- Keroro Gunso manga volume 7 chapter 57
- Keroro Gunso manga volume 6 chapter 52
- Keroro Gunso season 4 episode 178 "Momoka Gōsuto Hinataka no Maboroshi de Arimasu"
- Keroro Gunso season 3 episode 123 "Hinataka Satogaeri de Arimasu"
- Keroro Gunso manga volume 3 chapter 25
- Keroro Gunso season 1 episode 17b "Fuyuki Yōkoso Horā Wārudo e de Arimasu"
- Keroro Gunso season 1 episode 15 part 2 "Ura Momoka Uragiri no Uragawa de Arimasu"
- Keroro Gunso season 2, episode 81 "Giroro Makkana Dokonjō no Hibi de Arimasu"
- Keroro Gunso season 4 episode 169 part 2 "Giroro Bishōjo to Ekitai Keronjin de Arimasu"
- Sgt. Frog episode 89 Part A: Giroro, The Man with Seven Faces. Also, this is a parody of Seven of Seven.
- Sgt. Frog Volume 4, "Encounter 30.5: Letters from the Homeworld", pg. 29
- Sgt. Frog Volume 3, "Encounter XXI: Welcome to Radio-Free Keroro", pg. 13
- Kuru wikipedia page
- Keroro Gunso manga volume 7 chapter 55
- Keroro Gunso manga volume 7 chapter 56
- Episode 130, parts 1 & 2
- Sgt Frog Encounter LXXXII: The Last Battle: Keroro Platoon's 24 Hours. Part 2
- Keroro Gunso season 4 episode 181 "Mushishi Mushi no Idokoro o Sagase! de Arimasu"
- In episode 73 of the anime, she appears as a high school student when Fuyuki travels 20 years back in time.
- Keroro Gunso manga Vol. 13 chapter 107
- Keroro Gunso season 4 episode 181b "Momoka Sōdatsu! Nininsanyaku de Arimasu"
- Keroro Gunso season 4 episode 170b "Pururu & Chiruyo Himitsu no Tomodachi de Arimasu"
- Sgt. Frog Episode 53 Part B: Angol Mois, More More Flower-Viewing
- Keroro Gunso Season 1, episode 7 "Moa Hajimete no Chikyū Hakai"
- Keroro Gunso Manga Vol 14, chapter 117
- Keroro Gunso Season 1 episode 16 "Moa Ura Moa Kōrin!? de Arimasu"
- Keroro Gunso season 3 episode 113a "Keroro Tatakae Bokura no Wettoru Kingu de Arimasu" and 113b "Natsumi Kaettekita Wettoru Kingu de Arimasu".