The Devil Is a Part-Timer! (はたらく魔王さま!,Hataraku Maō-sama!, literally Working Demon King! or Demon Lord at Work!) is a Japanese light novel series written by Satoshi Wagahara, with illustrations by Oniku (written as 029). ASCII Media Works has published 18 volumes since February 2011. The story is about a demon king named Sadao Maou seeking to conquer the world of Ente Isla but, when confronted by the Hero Emilia, he is forced to retreat through a gate that transports him to modern day Tokyo, Japan. To survive and find a way to return to Ente Isla, Satan gains part-time employment at a fast food restaurant called MgRonald. There have been two manga adaptations published by ASCII Media Works in Dengeki Daioh and Dengeki Maoh. A 13-episode anime adaptation produced by White Fox and directed by Naoto Hosoda aired between April and June 2013.
The Demon Lord Satan seeks to conquer the world of Ente Isla by annexing its four continents with the help of his demon generals Alciel, Lucifer, Malacoda, and Adramelech. After being confronted by the hero Emilia Justina and her companions after they killed Malacoda and Adramelech, Satan Jacob and Alciel escape the world of Ente Isla through a gate to modern Tokyo, Japan. However, due to the lack of magic in the modern contemporary world, both Satan Jacob and Alciel change into forms representing what they would look like if they were human. In order to survive, Satan Jacob takes a part-time job in a fast food restaurant named MgRonald while Alciel serves as his houseman. One day, Satan Jacob, who now goes by Sadao Maō, meets a girl who is actually Emilia in the form of Emi Yusa. The story then unfolds and explores the personalities of each of the characters and their moral values. More characters show up from Ente Isla and they too face the new world dilemmas, often comically.
Satan Jacob is the Demon Lord from Ente Isla. Due to the actions of the Hero Emilia Justina and her companions, he was transported to modern day Japan with Ashiya and changed into human form. To survive in Japan, he adopts a Japanese name similar to his original name called Sadao Maou and works part-time at a MgRonald franchise, eventually being promoted to a full-time position as the Assistant Shift Manager. He and other demons can turn to their original form when people around them are filled with despair. However, when he changes his form to his devil form, he uses his powers for good deeds like repairing the city which always makes the characters confused due to his position as the Devil King. Throughout the series his current personality is often called into question though it is later shown that he had always been like that and was never once this evil "Overlord" that the people of Ente Isla had grown to fear and hate; in actuality he did the "evil" things he did to help his people, other demons. Like he told Emilia when he saved Chiho he just wants to protect the people under his care and around him. When he was younger, he was saved and taught by Emi's mother, Lailah. She also gave him a fragment of Sephiroth that would later become his and Emi's appointed daughter Alas Ramus.
Emilia is the hero with thigh-length magenta hair who fended off Satan. After forcing Satan to retreat from Ente Isla, Emilia Justina follows him to modern day Japan to ensure that he is destroyed. Like Maou, she loses most of her magical powers upon her arrival and is forced to assume a Japanese name, Emi Yusa, and find employment as a call center agent. Her father was human and her mother was an archangel. However, during her childhood, Lucifer, one of Maou's generals, led an army of demons to attack her village, resulting in the death of her father. This is revealed to be the reason she wants to kill Maou. However, it was later revealed that her father was alive. Emi is later fired from her job at the call center and gets a new job at MgRonald where she works with Maou and Chiho. She also later develops feelings for Maou in the light novels.
Ashiya is one of Satan's Generals, who was also transported to modern day Japan with him. Extremely loyal to Satan, Alsiel takes care of the domestic duties at home and researches ways to regain their magical powers. On Earth, Alsiel assumes the form of Shirō Ashiya who operates as Sadao's housekeeper. Anytime he fails in his duties, he is extremely disappointed in himself for not doing a better job at helping his master, even suffering emotional breakdowns. He is also extremely frugal in his spending habits, once resorting to eating a large amount of leftover udon that was about to expire (which resulted in a severely upset stomach).
Chiho is a high school student who is Sadao's friend and fellow employee at MgRonald. She has feelings for Sadao. Chiho is an average teenage girl of short stature who sports a highly curvaceous figure, a fact which is noted by several people and envied by other girls, especially Emi. She can hear and understand the language of Ente Isla due to accidentally being targeted with a communication spell intended for Emi, because the spell was set to target those who were thinking about Sadao constantly. She later learns how to use the magic spell Idea Link to allow her to alert the others if she is ever in danger.
Lucifer is a fallen angel and one of Satan's generals. After Satan was transported to the human world, Lucifer and Olba struck a deal in order to defeat Satan, with Olba promising to return Lucifer to heaven. After they are defeated by Satan, however, Lucifer moves into the apartment belonging to Sadao and Shirō. He is good with technology and loves playing video games. As a result of committing a series of robberies with Olba before being defeated by Sadao, he must remain in seclusion to avoid the police. To his irritation, he is usually referred to as a hikikomori or NEET, even when guests are present. His mother is the current leader of the angels, Ignora, and his father was the ancient demon lord, Sataniel.
Suzuno Kamazuki (鎌月 鈴乃,Kamazuki Suzuno) / Crestia Bell (クレスティア・ベル,Kuresutia Beru)
Sadao's next door neighbor. She is always wearing a kimono. Suzuno is the grand inquisitor of the Church in Ente Isla that, like Emi, came to kill Sadao. Unlike Emi, she apparently has trouble adjusting to the modern life of Japan and is easily found having trouble, especially with Japan's technology. She briefly teamed up with Sariel to eliminate both Sadao and Emi after Sariel reminded her of her duties as grand inquisitor, but after seeing Sadao concerned for Chiho and realizing that she values her friendship with Emi and Chiho, she ultimately turns against Sariel by helping Chiho evacuate the area while Satan and Sariel battle one another. She wields a giant mallet, which can be retracted into her flower-shaped hairpin.
Emilia's friend and comrade from Ente Isla. She is proficient in alchemy and is a court magician. Emeralda is the highest-ranked official who serves directly under the ruler of the Holy Saint Aire Empire, the greatest nation on the Western Continent. After returning from earth, she appears to have developed a liking for Pocky and modern conveniences such as the telephone.
The rogue Archbishop of the Church of Ente Isla. He betrayed Emilia and temporarily joined forces with Lucifer to kill Emilia and Satan Jacob. Following the failure of his plans, he is arrested by the police. He had been working with the corrupt Church of Ente Isla to kill those who opposed them, such as the members of the Allied Knight Order and anyone affiliated with them. He was Crestia's superior and would frequently give her assignments involving the brutal slaughter of the Church's enemies. Following his loss to Satan in Sasakuza, he is placed under guard in a hospital, where he regains consciousness after some time. After he escapes, he attempts to reestablish his contract with Lucifer and proceeds to aid Sariel in his battle against Satan by casting a spell to increase his power. It turns out that he had been tricked by Lucifer into creating a panic with the Moon spell, which causes Satan to regain his magic and defeat Sariel. Following Sariel's defeat, he is once again defeated and restrained, this time by Lucifer.
An Archangel used by the Church of Ente Isla as part of their Execution Inquisition along with Crestia Bell. He first attacks Emilia at a convenience store while in disguise. In order to learn about Satan Jacob and Emilia in the human world, he forges the identity of "Mitsuki Sarue", claiming to be the manager of the newly opened Sentucky Fried Chicken franchise in Hatagaya. He eventually teams up with Crestia in order to kill Emilia and Satan Jacob. His weapon is a large scythe, and he possesses a power called the "Wicked Light of the Fallen", a magic capable of nullifying all sacred powers, as shown when he battles Emilia. During his battle with Emilia, he demands that she return the holy sword "Better Half" to Heaven. He defeats and tortures Emilia while taking Chiho hostage, but he is ultimately defeated by Satan Jacob. He draws his magic from the Moon, with his power increasing the closer he is to it. He also has perverted tendencies, shown when he expresses a desire to strip Chiho down in his experiments to learn how she has been influenced by Satan's magic. After his defeat he develops an immediate infatuation with the manager of MgRonalds, much to Emilia's annoyance.
She is the owner of the "Villa Rosa Sasazuka" apartment building where Sadao Maō and Suzuno Kamazuki live. She is very obese and seems to know more than a Japanese person should about the visitors from Ente Isla. It is later revealed that she and her niece are God-like guardians of Earth.
Yuki Mizushima (水島 由姫,Mizushima Yuki)
Voiced by: Mamiko Noto (Japanese); Rachel Robinson (English)
The manager of Fushima Park's MgRonald branch.
Acies Ara (アシエス・アーラ,Ashiesu āra)
Alas Ramus' younger sister and another fragment of "Yesod". She lives with Emi's father, Nord Justinia. She later fuses with Maou to help him become more powerful.
Alas Ramus (アラス・ラムス,Arasu Ramusu)
The "daughter" of Satan and Emilia. She was formed by "Yesod" and brought to Japan by Lailah, Emilia's mother and Satan's savior. She later fuses with Emi's sword to help Emi become more powerful.
The Devil Is a Part-Timer! began as a light novel series written by Satoshi Wagahara, with illustrations by the artist 029 (Oniku). Wagahara originally entered the first novel in the series, originally titled Maōjō wa Rokujō Hitoma! (魔王城は六畳一間!), into ASCII Media Works' 17th Dengeki Novel Prize in 2010 and the novel won the Silver Prize. The first novel was published by ASCII Media Works on February 10, 2011, under their Dengeki Bunko imprint, and 18 main novels have been released as of January 10, 2018. Two prequel novels have also been published. In an interview with Publishers Weekly, Yen Press announced their plans to publish the light novels in 2015.
A manga adaptation, illustrated by Akio Hiiragi, started serialization in the February 2012 issue of ASCII Media Works' shōnen manga magazine Dengeki Daioh. The first tankōbon volume was published on June 27, 2012. Yen Press began publishing the manga in North America in 2015. A spin-off manga series, illustrated by Kurone Mishima and titled The Devil Is a Part-Timer! High School! (はたらく魔王さま！ハイスクール！,Hataraku Maō-sama! Hai Sukūru!), began serialization in the July 2012 issue of ASCII Media Works' Dengeki Maoh magazine. Its chapters have been compiled in three tankōbon volumes, released between January 26 and December 21, 2013. A four-panel mangaanthology volume was published by ASCII Media Works on June 27, 2013.
A 13-episode anime television series adaptation of The Devil Is a Part-Timer!, produced by White Fox and directed by Naoto Hosoda, aired between April 4 and June 27, 2013. The anime has Masahiro Yokotani as the script supervisor and Atsushi Ikariya adapts 029's characters designs.Funimation streamed the series as it aired and released it on home video in summer 2014. The opening theme is "Zero!!" by Minami Kuribayashi. There are three ending theme songs, "Gekka" (月花, lit. "Moon Flower"), "Star Chart" (スターチャート,Sutā Chāto), and "Tsumabiku Hitori" (ツマビクヒトリ), all by Nano Ripe.