List of Kamen Rider Zi-O characters

Promotional image of Kamen Rider Zi-O's main cast. From left to right, Woz (Keisuke Watanabe), Geiz Myokoin (Gaku Oshida), Sogo Tokiwa (So Okuno) and Tsukuyomi (Shieri Ohata).

Kamen Rider Zi-O (仮面ライダージオウ, Kamen Raidā Jiō) is a Japanese tokusatsu drama and the 29th entry in the Kamen Rider series. It follows the exploits of Sougo Tokiwa, a young man who, according to visitors from the future, is destined to become the king who will enslave the entire world, and embarks in a quest to change his fate, meeting several other Kamen Riders from the Heisei era along the way.

9-to-5

9-to-5 (クジゴジ堂, Kujigojidō) is a clock shop owned by Junichirō Tokiwa where he lives with his grandnephew Sogo.

Sogo Tokiwa

Sogo Tokiwa (常磐 ソウゴ, Tokiwa Sōgo) is an 18, later 19-year old graduate of the Hikarigamori High School (光ヶ森高等学校, Hikarigamori Kōtō Gakkō). Born on April 28, 2000, he dreamed of becoming a king after experiencing a series of nightmares in his childhood and being visited by a mysterious figure that entrusted him with the prophecy. After surviving a bus accident when he was nine, Sogo became orphaned and since then lived with his great-uncle in the 9-to-5. After meeting Tsukuyomi and Geiz, he learns he will become the King of Time Ohma Zi-O, a Demon King destined to rule the world with an iron fist. Despite being troubled by the possibility he is cursed to become a tyrant, Sogo chooses to continue following his dream while changing his fate, accepting the power to become Kamen Rider Zi-O and declaring that he would become a benevolent Demon King instead. Despite Geiz and Tsukuyomi's reservations, Sogo considers them friends and trusts them with his life; asking both of them to kill him should he follow the path to becoming Ohma Zi-O. All the while, his predecessor Tsukasa Kadoya secretly watched over him to ensure he succeeded in changing his fate.

Originally, Sogo was a visionary high school student prior to his graduation, but he developed his strengths along his journey. He has a tendency to hold back while fighting, though he will become dangerous when he stops doing so, something his opponents found out the hard way on different occasions. Sogo's lack of knowledge about past Kamen Riders has caused him to stray from his predecessors' trademark abilities with comical results while being criticized for his incompetence. Sogo is also a keen manipulator due to his observant nature and understanding of human behavior, such as exploiting Black Woz's loyalty to him on occasions and outsmarting a genius of Kuroto Dan's caliber. In 2019, Sogo developed the ability to subconsciously create alternate futures, which he initially assumed were prophetic dreams of Kamen Riders from White Woz's timeline. Ever since the bus accident, he also proved capable of stopping time like the Time Jackers. However, Swartz erased his memory of it, explaining why he has not used the ability until after he became Grand Zi-O.

In Kamen Rider Heisei Generations Forever, Sogo joined forces with the Heisei Kamen Riders to defeat the Super Time Jacker, Tid, from wiping out their history as well as save the Hisanaga brothers from his machinations.

As a result of Swartz's plans, a convergence of the Rider A.R. Worlds commenced. After Tsukuyomi seemingly betrayed him and Geiz died saving him, an enraged Sogo became Kamen Rider Ohma Zi-O (仮面ライダーオーマジオウ, Kamen Raidā Ōma Jiō) to defeat Swartz himself. Once he did so, he chose to sacrifice Ohma Zi-O's power to reset the space-time continuum; negating his destiny and undoing Swartz's damage. Due to this, he redid his senior year in 2018 with altered versions of Geiz, Tsukuyomi, Heure, and Ora as his classmates in the new timeline.

During the events of Kamen Rider Reiwa: The First Generation, Sogo temporarily regained his Rider powers after he learns of Finis, a Time Jacker who survived his time reboot and swore vengeance against him. Joining forces with Geiz, Tsukuyomi, and Black Woz once more, Sogo entered the World of Zero-One to rescue their successors, Kamen Rider Zero-One and the A.I.M.S. Riders; all of whom Finis also attacked as part of their revenge plot. Sogo and his friends later learned that Zero-One was created by Sogo's dreams.

In Kamen Rider Zi-O Next Time: Geiz, Majesty, Sogo permanently regained his powers while helping Geiz in his fight against a new White Woz, who became Another Diend to become a savior.

In an alternate timeline depicted in Over Quartzer, Sogo and his friends helped Go Shijima preserve Kamen Rider Drive's history after Oda Nobunaga lost the Battle of Nagashino. After going back in time and preventing this event from occurring, Sogo received the Drive and Mach Ride Watches. However, Black Woz betrayed him; taking all of his Ride Watches and imprisoning Sogo on behalf of the Quartzers. He was released by Tsukuyomi and Go, then receives the Ohma Zi-O Ride Watch to defeat the leader of the Quartzers; an adult version of himself from an alternate timeline. After Sogo defeats his evil counterpart as Zi-O Ohma Form, he was recognized as a king, fulfilling his dream.

To transform into Kamen Rider Zi-O, Sogo uses the Ziku-Driver (ジクウドライバー, Jikū Doraibā, Space-Time Driver) in conjunction with the Ride Watches (ライドウォッチ, Raidowotchi). His personal weapon is the Zikan Girade (ジカンギレード, Jikan Girēdo), which has a Ken Mode (ケンモード, Ken Mōdo, Sword Mode) and a Ju Mode (ジュウモード, Jū Mōdo, Gun Mode), which can perform the Edge of Time Slash (ギリギリスラッシュ, Giri Giri Surasshu) finisher and the Sure Sure Shooting (スレスレシューティング, Sure Sure Shūtingu) finisher respectively. He also owns a Time Mazine, a time traveling vehicle given to him by Tsukuyomi that can transform into a humanoid robot, and Woz's Faiz Phone X to communicate with Tsukuyomi and Geiz through time.

• Zi-O (ジオウ, Jiō): Sogo's personal Ride Watch, dated 2018, which allows him to transform into Kamen Rider Zi-O and convert his Time Mazine from Vehicle Mode to Robot Mode. His finisher is the Time Break (タイムブレーク, Taimu Burēku).
• Bike (バイク, Baiku): An undated Ride Watch that allows Sogo to summon his personal motorcycle, the Ride Striker (ライドストライカー, Raido Sutoraikā).
• Build (ビルド, Birudo): Dated 2017, this Ride Watch is based on Kamen Rider Build Rabbit Tank Form. It equips Zi-O with the Build Armor (ビルドアーマー, Birudo Āmā), enabling him to channel agility and endurance capabilities based on the Rabbit and Tank Fullbottles, respectively. He is also armed with a weapon modeled after Build's Drill Crusher known as the Drill Crusher Crusher (ドリルクラッシャークラッシャー, Doriru Kurasshā Kurasshā). Zi-O's finisher in this form is the Vortex Time Break (ボルテックタイムブレーク, Borutekku Taimu Burēku). When used on the Time Mazine, it can assume Build Mode (ビルドモード, Birudo Mōdo).
• Ex-Aid (エグゼイド, Eguzeido): Dated 2016, this Ride Watch is based on Kamen Rider Ex-Aid Action Gamer Level 2. It equips Zi-O with the Ex-Aid Armor (エグゼイドアーマー, Eguzeido Āmā), which enables him to generate a Mighty Action X-themed Game Area with chocolate block-like platforms. He is also armed with a pair of gauntlets modeled after the Gashacon Breaker known as the Gashacon Breaker Breakers (ガシャコンブレイカーブレイカー, Gashakon Bureikā Bureikā). Zi-O's finisher in this form is the Critical Time Break (クリティカルタイムブレーク, Kuritikaru Taimu Burēku). When used on the Time Mazine, it can assume Ex-Aid Mode (エグゼイドモード, Eguzeido Mōdo).
• Fourze (フォーゼ, Fōze): Dated 2011, this Ride Watch is based on Kamen Rider Fourze Base States. It equips Zi-O with the Fourze Armor (フォーゼアーマー, Fōze Āmā), which enables him to fly by transforming into a Rocket Mode (ロケットモード, Roketto Mōdo). He is also armed with a pair of weapons modeled after Fourze's Rocket Module known as the Booster Modules (ブースターモジュール, Būsutā Mojūru). Zi-O's finisher in this form is the Limit Time Break (リミットタイムブレーク, Rimitto Taimu Burēku). If used in the Zikan Girade in Gun Mode, it becomes capable of launching rockets.
• OOO (オーズ, Ōzu): Dated 2010, this Ride Watch is based on Kamen Rider OOO Tatoba Combo. It equips Zi-O with the OOO Armor (オーズアーマー, Ōzu Āmā), granting him the Tora Claw Z (トラクローZ, Tora Kurō Zetto) on his right hand and a pair of Batta Springers (バッタスプリンガー, Batta Supuringā) on his legs for enhanced jumping capabilities. Zi-O's finisher in this form is the Scanning Time Break (スキャニングタイムブレーク, Sukyaningu Taimu Burēku). When used on the Time Mazine, it can assume OOO Mode (オーズモード, Ōzu Mōdo).
  • Taka (タカ, Hawk): A Ride Gadget of unknown origin that transforms into the Taka Watchroid (タカウォッチロイド, Taka Wotchiroido), which is based on the Kougami Foundation's Taka Candroid. Being a sentient Ride Watch, it is used for reconnaissance missions.
  • Tajadol Combo (タジャドルコンボ, Tajadoru Konbo): Dated 2010, this Ride Watch is based on Kamen Rider OOO Tajadol Combo. When used on the Time Mazine, it can assume Tajadol Combo Mode (タジャドルコンボモード, Tajadoru Konbo Mōdo) for aerial combat. Its finisher is the Giga Scan Time Break (ギガスキャンタイムブレーク, Giga Sukyan Taimu Burēku).
• Gaim (鎧武, Gaimu): Dated 2013, this Ride Watch is based on Kamen Rider Gaim Orange Arms. It equips Zi-O with the Gaim Armor (鎧武アーマー, Gaimu Āmā), which grants him four Daidaimaru Z (大橙丸Z, Daidaimaru Zetto, Great Orange Circle Z) swords themed after Gaim's Daidaimaru for melee combat and the Lockseed Shoulders (ロックシードショルダー, Rokkushīdo Shorudā) that allow him to open Crack portals. Zi-O's finisher in this form is the Squash Time Break (スカッシュタイムブレーク, Sukasshu Taimu Burēku). If it is used in the Zikan Girade, it gains increased slicing capabilities.
  • Kodama (コダマ, Little Ball): A Ride Gadget that can be used to communicate across different dimensions and unfolds into the Kodama Suika Arms (コダマスイカアームズ, Kodama Suika Āmuzu, Little Ball Watermelon Arms), a miniature drone based on the Suika Arms attack drone used by the Yggdrasill Corporation and Armored Riders.
• Double (ダブル, Daburu): Dated 2009, this Ride Watch is based on Kamen Rider Double CycloneJoker. It equips Zi-O with the Double Armor (ダブルアーマー, Daburu Āmā), granting him abilities similar to Double's powers. Zi-O's finisher in this form is the Maximum Time Break (マキシマムタイムブレーク, Makushimamu Taimu Burēku). If it is used in the Zikan Girade, it becomes capable of firing green air blasts at the enemy.
• Kuuga (クウガ, Kūga): Dated 2000, this Ride Watch is based on Kamen Rider Kuuga Mighty Form. It equips Zi-O with the Kuuga Armor (クウガアーマー, Kūga Āmā), granting him abilities similar to Kuuga's powers. Zi-O's finisher in this form is the Mighty Time Break (マイティタイムブレーク, Maiti Taimu Burēku). When used on the Time Mazine, it can assume Kuuga Mode (クウガモード, Kūga Mōdo).
• Ryuki (龍騎, Ryūki): Dated 2002, this Ride Watch is based on Kamen Rider Ryuki. If used in the Ride Heisaber, Zi-O gains flaming slash attacks.
• Blade (ブレイド, Bureido): Dated 2004, this Ride Watch is based on Kamen Rider Blade Ace Form.
  • Chalice (カリス, Karisu): Dated 2004, this Ride Watch is based on Kamen Rider Chalice.
• Agito (アギト): Dated 2001, this Ride Watch is based on Kamen Rider Agito Ground Form. It was originally obtained by Heure when he stole Agito's powers from Shouichi Tsugami, but the latter regained it and gave it to Sogo.
• Hibiki (響鬼): Dated 2005, this Ride Watch is based on Kamen Rider Hibiki.
• Kiva (キバ, Kiba): Dated 2008, this Ride Watch is based on Kamen Rider Kiva.
• Kabuto (カブト): Dated 2006, this Ride Watch is based on Kamen Rider Kabuto Rider Form and was originally the Kabuto Zecter before it transformed itself.
• Den-O (電王, Den'ō): Dated 2007, this Ride Watch is based on Kamen Rider Den-O Sword Form.
• Mach (マッハ, Mahha): Dated 2014, this Ride Watch is based on Kamen Rider Mach. This Ride Watch is exclusive to Over Quartzer.

Along his journey, Sogo acquires the Decade (ディケイド, Dikeido) Ride Watch from Tsukasa through Geiz. Dated 2009, this Ride Watch equips Zi-O with the Decade Armor (ディケイドアーマー, Dikeido Āmā), which allows him to augment his form with one of his Rider predecessors' power-up forms by combining the Decade Ride Watch with their corresponding Ridewatch. He is also armed with the Ride Heisaber (ライドヘイセイバー, Raido Heiseibā), which allows him to utilize any of the previous 19 Heisei Kamen Riders' powers without tapping into their Ride Watches for the Dual Time Break (デュアルタイムブレーク, Dyuaru Taimu Burēku) attack as well as perform one of two finishers: the Scramble Time Break (スクランブルタイムブレーク, Sukuranburu Taimu Burēku) or Ultimate Time Break (アルティメットタイムブレーク, Arutimetto Taimu Burēku). This form has two finishers: Attack Time Break (アタックタイムブレーク, Atakku Taimu Burēku) and Final Attack Time Break (ファイナルアタックタイムブレーク, Fainaru Atakku Taimu Burēku).

• Build Form (ビルドフォーム, Birudo Fōmu): A form accessed by combining the Decade and Build Ride Watches, based on Kamen Rider Build's Rabbit Tank Sparkling Form.
• Ghost Form (ゴーストフォーム, Gōsuto Fōmu): A form accessed by combining the Decade and Ghost Watches, based on Kamen Rider Ghost Grateful Damashii form.
• Ex-Aid Form (エグゼイドフォーム, Eguzeido Fōmu): A form accessed by combining the Decade and Ex-Aid Ride Watches, based on Kamen Rider Ex-Aid's Action Gamer Level XX form. This form splits Zi-O into two different Riders, the azure-colored Ex-Aid Form L (エグゼイドフォーム L, Eguzeido Fōmu Eru) and the orange-colored Ex-Aid Form R (エグゼイドフォームR, Eguzeido Fōmu Āru).
• OOO Form (オーズフォーム, Ōzu Fōmu): A form accessed by combining the Decade and OOO Ride Watches, based on Kamen Rider OOO's Tajadol Combo form.
• Ryuki Form (龍騎フォーム, Ryūki Fōmu): A form accessed by combining the Decade and Ryuki Ride Watches, based on Kamen Rider Ryuki Survive. This form is exclusive to Rider Time: Kamen Rider Ryuki.
• Saber Form (セイバーフォーム, Seibā Fōmu): A form accessed by combining the Decade and Saber Ride Watches, based on Kamen Rider Saber Brave Dragon. This form is exclusive to Rider Time: Kamen Rider Zi-O vs. Decade: Seven Zi-O!.

While battling the Another Rider, Another Ryuga, and his Mirror World counterpart, Sogo gained the Zi-O Ride Watch II (ジオウライドウォッチⅡ, Jiō Raidowotchi Tsū), which allows him to transform into Kamen Rider Zi-O II (仮面ライダージオウⅡ, Kamen Raidā Jiō Tsū). In this form, Zi-O sacrifices his ability to use Ride Armors in order to gain the power to manipulate time as well as precognitive sight, which allows him to see seconds into the future. He is also armed with the Saikyo Girade (サイキョーギレード, Saikyō Girēdo), which can combine with the Zikan Girade in Ken Mode to form the Saikyo Zikan Girade (サイキョージカンギレード, Saikyō Jikan Girēdo) in order to perform the King Edge of Time Slash (キングギリギリスラッシュ, Kingu Giri Giri Surasshu) finisher. Zi-O's finisher in this form is the Twice Time Break (トゥワイスタイムブレーク, Tuwaisu Taimu Burēku).

While battling Another Blade, Sogo received the Zi-O Trinity Ride Watch (ジオウトリニティライドウォッチ, Jiō Toriniti Raidowotchi), which allows him to fuse with Geiz and Black Woz to become Kamen Rider Zi-O Trinity (仮面ライダージオウトリニティ, Kamen Raidā Jiō Toriniti). In this form, the three can utilize all of their powers and weapons at once. This form has three finishers: Solo Time Break (ソロタイムブレーク, Soro Taimu Burēku), Duo Time Break Burst (デュオタイムブレークバースト, Dyuo Taimu Burēku Bāsuto), and Trinity Time Break Burst Explosion (トリニティタイムブレークバーストエクスプロージョン, Toriniti Taimu Burēku Bāsuto Ekusupurōjon).

Once he acquired all 19 of his Rider predecessors' Ride Watches, Sogo received the Grand Zi-O Ride Watch (グランドジオウライドウォッチ, Gurando Jiō Raidowotchi), which allows him to become Kamen Rider Grand Zi-O (仮面ライダーグランドジオウ, Kamen Raidā Gurando Jiō). In this form, he retains his ability to control time, but gains the ability to summon any of his predecessors from their active timeline to fight by his side and utilize their weapons along with his own. Zi-O's finisher in this form is the All Twenty Time Break (オールトゥエンティタイムブレーク, Ōru Tuenti Taimu Burēku).

During the events of Over Quartzer, Sogo obtained a Ride Watch based on Ohma Zi-O, which allowed him to transform into Zi-O Ohma Form (オーマフォーム, Ōma Fōmu), which grants him the vast power of his future self. Zi-O's finisher in this form is the King Time Break (キングタイムブレーク, Kingu Taimu Burēiku).

During his final battle against Swartz, Sogo converted his Ziku-Driver into the Ohma Zi-O Driver, acquiring the ability to transform into Kamen Rider Ohma Zi-O and become powerful enough to destroy enemies with a single attack. His finisher is the Ohma Zi-O Hissatsugeki (逢魔時王必殺撃, Ōma Jiō Hissatsugeki, Ohma Zi-O Finishing Attack).

In addition to his own Ride Watches, Sogo is capable of using Geiz's Ride Watches.

• Ghost: Dated 2015, this Ride Watch is based on Kamen Rider Ghost Ore Damashii. Sogo originally used Geiz's Ghost Ride Watch before Decade neutralized it and he acquired his own version from Takeru Tenkūji. The Ghost Ride Watch equips Zi-O with the Ghost Armor, which enables him to summon Ghost's Hoodie Ghosts as reinforcements. He also gains levitation capabilities, as well as invisibility and intangibility. Zi-O's finisher in this form is the Omega Time Break (オメガタイムブレーク, Omega Taimu Burēku).

Sogo Tokiwa is portrayed by So Okuno (奥野 壮, Okuno Sō) while Rui Takahashi (高橋 琉晟, Takahashi Rui) and Haru Takagi (高木 波瑠, Takagi Haru) portray him as a child and younger child respectively. The character is named after Tokiwa-sō, the former apartment of Shotaro Ishinomori.

Junichirō Tokiwa

Junichirō Tokiwa (常磐 順一郎, Tokiwa Jun'ichirō) is the owner of 9-to-5 and Sogo's great uncle. Even though his shop specializes in repairing clocks, he rarely has orders to fix them nowadays, and usually works on repairing other old devices to make ends meet. In spite of this, he has demonstrated a form of intellect in repairing unique watches since he was able to repair the DenLiner time train and repair Sogo's Ride Watches. Although he does not think highly of Sogo's idea dreams, he feels glad that he has Geiz and Tsukuyomi as friends; recognizing how positive their influence on him has been. After Sogo defeated Another Zi-O II, Junichiro discovers Sogo's secret as a Kamen Rider and shows pride in him for fighting for good.

Junichirō Tokiwa is portrayed by Katsuhisa Namase (生瀬 勝久, Namase Katsuhisa).

People from 2068

Geiz Myokoin

Geiz Myokoin (明光院 ゲイツ, Myōkōin Geitsu) is an 18-year old soldier from the year 2068 who joined the resistance against Ohma Zi-O as Kamen Rider Geiz (仮面ライダーゲイツ, Kamen Raidā Geitsu). While he traveled back in time to kill Sogo before he can become Ohma Zi-O, he momentarily relents after Sogo saves him while fighting the Another Rider, Another Build. At Tsukuyomi's request, Geiz agreed to stay his hand and watch events play out, becoming an on-again-off-again house guest of Sogo's. Throughout the series, Geiz struggled with his original mission of killing Sogo to prevent Ohma Zi-O's existence and his growing friendship with him before eventually becoming more open about his feelings and accepting Sogo as his friend following Another Zi-O's attacks.

In Kamen Rider Heisei Generations Forever, Geiz nearly lost his memories while helping Sogo defeat the Super Time Jacker Tid. However, he was able to go back in time to obtain Kamen Rider Kuuga's powers and give Sogo the Kuuga Ride Watch before helping him and the Heisei Kamen Riders in the final battle against Tid.

After defeating Another Zi-O II, Geiz discovered the future he came from was actually an alternate dimension where Ohma Zi-O continues to exist despite Sogo's efforts to avoid becoming him. During the final battle against Swartz, Geiz dies protecting Sogo; begging him to become Ohma Zi-O and defeat Swartz with his dying words. After Sogo defeated the Time Jacker and reset time and reality, Geiz was revived as Keito Myokoin (明光院 景都, Myōkōin Keito), a contemporary classmate of Sogo's with the nickname "Geiz".

During the events of Kamen Rider Reiwa: The First Generation, Geiz temporarily regained his memories from the original timeline and helped Sogo defeat the surviving Time Jacker, Finis, who sought to renew Swartz's plot to destroy the Kamen Rider multiverse before losing them again once Finis was stopped.

In Kamen Rider Zi-O Next Time: Geiz, Majesty, Geiz was visited by a new iteration of White Woz, who granted him his powers from the original timeline. After meeting several past secondary Riders and seeing White Woz become the monstrous Another Diend to endanger Sogo, Geiz became Kamen Rider Geiz once more and joined forces with his old friends to stop him. When he was on the verge of defeat however, Daiki Kaito granted him the Geiz Majesty Ride Watch, which gave Geiz the power he needed to defeat Another Diend, as well as permanently restored his memories. Following this, Geiz returned to his regular life with his powers and memories intact.

Like Sogo, Geiz uses a Ziku-Driver with his own Ride Watches in order to transform. His personal weapon is the Zikan Zax (ジカンザックス, Jikan Zakkusu), which has a Yumi Mode (ゆみモード, Yumi Mōdo, Bow Mode) that can perform the Kiwa Kiwa Shoot (キワキワシュート, Kiwa Kiwa Shūto) finisher and an Ono Mode (おのモード, Ono Mōdo, Axe Mode) that can perform the Zakkuri Cutting (ザックリカッティング, Zakkuri Kattingu) finisher. He also possesses a red Time Mazine and a Faiz Phone X.

• Geiz (ゲイツ, Geitsu): Geiz's personal Ride Watch, dated 2068, which allows him to transform into Kamen Rider Geiz and convert his Time Mazine from Vehicle Mode to Robot Mode. His finisher is the Time Burst (タイムバースト, Taimu Bāsuto).
• Bike: An undated Ride Watch that allows Geiz to summon his own Ride Striker.
• Ghost (ゴースト, Gōsuto): Dated 2015, this Ride Watch is based on Kamen Rider Ghost Ore Damashii. One of two Ride Watches he stole from Ohma Zi-O, it equips Geiz with the Ghost Armor (ゴーストアーマー, Gōsuto Āmā). In this form, he gains levitation, invisibility, and intangibility and can perform the Omega Time Burst (オメガタイムバースト, Omega Taimu Bāsuto) finisher. If used in the Zikan Zax, he is able to use orange spiritual energy to attack the enemy. After Tsukasa negated this Ride Watch, Geiz began using the one Sogo received from Takeru.
• Cross-Z (クローズ, Kurōzu): Dated 2017, this Ride Watch is based on Kamen Rider Cross-Z. If used in the Zikan Zax, Geiz can summon a blue energy dragon. When used on the Time Mazine, it can assume Cross-Z Mode (クローズモード, Kurōzu Mōdo).
• Drive (ドライブ, Doraibu): Dated 2014, this Ride Watch is based on Kamen Rider Drive Type Speed. The second of two Ride Watches he stole from Ohma Zi-O, it equips Geiz with the Drive Armor (ドライブアーマー, Doraibu Āmā), which allows him to channel acceleration capabilities and launch two autonomous projectiles modeled after Drive's Shift Speed Car known as the Shift Speed Speeds (シフトスピードスピード, Shifuto Supīdo Supīdo). Geiz's finisher in this form is the Hissatsu Time Burst (ヒッサツタイムバースト, Hissatsu Taimu Bāsuto, Finisher Time Burst). Like the Ghost Ride Watch, Geiz stole the Drive Ride Watch from Ohma Zi-O.
• Faiz (ファイズ, Faizu): Dated 2003, this Ride Watch is based on Kamen Rider Faiz. It equips Geiz with the Faiz Armor (ファイズアーマー, Faizu Āmā), which enables him to materialize replicas of Faiz's SB-555C Faiz Shot and SB-555L Faiz Pointer weapons known as the Faiz Shot Shot (ファイズショットショット, Faizu Shotto Shotto) and Faiz Pointer Pointer (ファイズポインターポインター, Faizu Pointā Pointā), respectively. Geiz's finisher in this form is the Exceed Time Burst (エクシードタイムバースト, Ekushīdo Taimu Bāsuto).
  • Phone (フォン, Fon): A Ride Gadget which is commonly used as a communication device, the Faiz Phone X (ファイズフォン X(テン), Faizu Fon Ten) is utilized by time travelers from 2068. While using the Faiz Armor, Geiz can use this device to summon weapons.
• Wizard (ウィザード, Wizādo): Dated 2012, this Ride Watch is based on Kamen Rider Wizard Flame Style. It equips Geiz with the Wizard Armor (ウィザードアーマー, Wizādo Āmā), which allow him to generate spells based on the Wizard Rings. Geiz's finisher in this form is the Strike Time Burst (ストライクタイムバースト, Sutoraiku Taimu Bāsuto). If used in the Zikan Zax, Geiz is able to use magic to attack the enemy.
• Genm (ゲンム, Genmu): Dated 2016, this Ride Watch is based on Kamen Rider Genm Action Gamer Level 2. It equips Geiz with the Genm Armor (ゲンムアーマー, Genmu Āmā), which enables him to utilize Genm's attacks and generate a Game Area. Geiz's finisher in this form is the Critical Time Burst (クリティカルタイムバースト, Kuritikaru Taimu Bāsuto). When used on the Time Mazine, it can assume Genm Mode (ゲンムモード, Genmu Mōdo) and utilize Shin Kuroto Dan's warp pipes for teleportation purposes.
• Knight (ナイト, Naito): Dated 2002, this Ride Watch is based on Kamen Rider Knight. If used in the Zikan Zax, Geiz can fire swirling blue energy.
• Bibill (ビビル, Bibiru): Dated 2019, this Ride Watch is based on Kamen Rider Ghost's ally Yurusen and was temporarily created from the Ghost Ride Watch. It equips Geiz with the Bibill Armor (ビビルアーマー, Bibiru Āmā). His finisher in this form is the Bibill Time Burst (ビビルタイムバースト, Bibiru Taimu Bāsuto). This form is exclusive to the "Hyper Battle DVD" Kamen Rider Bi Bi Bi no Bibill Geiz.

Using the power of White Woz's MiRide Watches and his determination to become stronger, Geiz obtained the hourglass-like Geiz Revive Ride Watch (ゲイツリバイブライドウォッチ, Geitsu Ribaibu Raidowotchi), which he can use to become Kamen Rider Geiz Revive (仮面ライダーゲイツリバイブ, Kamen Raidā Geitsu Ribaibu). As Geiz Revive, he is armed with the Zikan Jaclaw (ジカンジャックロー, Jikan Jakkurō). He also has access to two sub-forms:

• Geiz Revive Goretsu (ゲイツリバイブ剛烈, Geitsu Ribaibu Gōretsu, Geiz Revive Ardent Strength), which is dedicated to strength. In this sub-form, he wields the Zikan Jaclaw in its Noko Mode (のこモード, Noko Mōdo, Saw Mode), which can perform the Super Noko Setsuzan (スーパーのこ切斬, Sūpā Noko Setsuzan, Super Saw Cutting) finisher. Geiz's finisher in this sub-form is the Ichigeki Time Burst (一撃タイムバースト, Ichigeki Taimu Bāsuto, One Strike Time Burst).
• Geiz Revive Shippu (ゲイツリバイブ疾風, Geitsu Ribaibu Shippū, Geiz Revive Hurricane), which is dedicated to speed and has flight capabilities. In this sub-form, he wields the Zikan Jaclaw in its Tsume Mode (つめモード, Tsume Mōdo, Claw Mode) which can perform the Super Tsume Renzan (スーパーつめ連斬, Sūpā Tsume Renzan, Super Claw Multi-Slash) finisher. Geiz's finisher in this sub-form is the Hyakuretsu Time Burst (百烈タイムバースト, Hyakuretsu Taimu Bāsuto, Hundred-Fierce Time Burst).

During the events of Kamen Rider Zi-O Next Time: Geiz, Majesty, Geiz temporarily obtained the Geiz Majesty Ride Watch (ゲイツマジェスティライドウォッチ, Geitsu Majesuti Raidowotchi) after merging all of Daiki's Secondary Rider Cards, which allowed him to become Kamen Rider Geiz Majesty (仮面ライダーゲイツマジェスティ, Kamen Raidā Geitsu Majesuti). Similarly to Grand Zi-O with the 19 primary Heisei Riders, this form allows Geiz to invoke the combined powers and weapons of all 18 secondary Heisei Kamen Riders. Geiz's finisher in this form is the Il Salvatore Time Burst (エル・サルバトーレタイムバースト, Iru Sarubatōre Taimu Bāsuto).

In addition to his own Ride Watches, Geiz is capable of using Zi-O's Ride Watches.

• Build: Loaned from Zi-O, Geiz can equip the Build Armor and perform the Vortex Time Burst (ボルテックタイムバースト, Borutekku Taimu Bāsuto) finisher.
• Gaim: Used as part of future Sogo's plan to free Geiz, the Ride Watch's energy allowed him to escape Helheim through an unstable Crack.
• Ex-Aid: Loaned from Zi-O, Geiz can equip the Ex-Aid Armor, which allowed him to generate a Mighty Action X themed Game Area with chocolate block platforms and perform the Critical Time Burst finisher.

Geiz Myokoin is portrayed by Gaku Oshida (押田 岳, Oshida Gaku).

Tsukuyomi

Alpina (アルピナ, Arupina), aka Tsukuyomi (ツクヨミ, Tsukuyomi), is a mysterious 18-year old girl of nobility from the year 2068 and the younger sister of Time Jacker leader, Swartz. She was chosen to succeed her parents due to her chronokinetic powers, though Swartz intended to use her for his own ends. When she hesitated to stop him, he erased her memories and stranded her in Ohma Zi-O's timeline, where she ended up with the Resistance under a new name. Disapproving of Geiz's plan to kill Sogo in 2018 for fear of damaging the timeline, she went back in time with him to instead help Sogo avert his future through gentler means.

In Kamen Rider Heisei Generations Forever, Tsukuyomi and Geiz help Sogo recover his lost memories. Upon meeting Ataru Hisanaga however, Tsukuyomi loses her memories as well. After learning the Super Time Jacker Tid was responsible, Geiz brought Tsukuyomi back in time with him to obtain the Kuuga Ride Watch so Sougo and the Heisei Kamen Riders could defeat Tid. Once they succeeded, everyone's memories are restored.

Initially, Tsukuyomi found it hard to believe the kindly Sogo could become the tyrannical Ohma Zi-O. As his Rider powers grew in strength however, she became paranoid; to the point where she demanded Geiz kill Sogo and went back to the latter's childhood to do it herself when Geiz refused. While on this venture however, she discovered Swartz orchestrated everything that had happened throughout the series, including Sogo becoming Zi-O. While trying to save the younger Sogo from her brother, Tsukuyomi inadvertently caused the bus accident that claimed the lives of Sougo's parents as well as severe damage to the timeline. She was saved by Tsukasa Kadoya, who showed her how Swartz kidnapped all of the children on the bus as they all had the potential to become Zi-O.

Realizing her mistake and that Sogo becoming Ohma Zi-O was one of many possible futures, a repentant Tsukuyomi made amends with Sogo and Geiz. Soon after, she began to slowly regain her memories after rediscovering her powers and meeting her younger self in 2058. When Another Zi-O II attacked Sogo, Tsukuyomi was captured by the Time Jackers so Swartz could reveal their original past to her before taking her powers. As she fully regained her original memories, Black Woz rescued her once Another Zi-O II was defeated.

When Swartz caused a convergence of the Rider A.R. Worlds, he attempted to kill Tsukuyomi since she had the power to stop him. However, Sogo had given a past version of her a blank Ride Watch that he infused with Ohma Zi-O's power, which activated during the calamity's height. Once Black Woz provided her with a Ziku-Driver, Tsukuyomi gained the power become Kamen Rider Tsukuyomi (仮面ライダーツクヨミ, Kamen Raidā Tsukuyomi). However, she seemingly chose to betray her friends to help her brother. After Sogo became Ohma Zi-O, she mortally wounded Swartz before he killed her in retaliation. When Sogo defeated Swartz and sacrificed Ohma Zi-O's power to undo the Time Jackers' damage, Tsukuyomi was revived in the new timeline as Alpina Tsukuyomi (月読 有日菜, Tsukuyomi Arupina), one of Sogo's contemporary high school classmates.

During the events of Kamen Rider Reiwa: The First Generation, she temporarily regained her memories of the original timeline before joining forces with Sogo, Geiz, and Black Woz to save Kamen Rider Zero-One and the A.I.M.S. Riders from the surviving Time Jacker, Finis. Once they are stopped, Tsukuyomi lost her memories once more.

In Kamen Rider Zi-O Next Time: Geiz, Majesty, Tsukuyomi permanently regained her memories along with her powers while helping Geiz in his fight against a new White Woz as Another Diend.

Even though she did not become a Kamen Rider until the end of the series, Tsukuyomi possessed her own Faiz Phone X for self-defense purposes and to communicate with her friends through time. She also owned a Time Mazine, which she lent to Sogo in the hopes of assisting him with time travel. Following Sogo's battle with the monstrous Another Agito, Tsukuyomi regained her ability to stop time. As Kamen Rider Tsukuyomi, she is capable of performing the Time Jack (タイムジャック, Taimu Jakku) finisher.

Tsukuyomi is portrayed by Shieri Ohata (大幡 しえり, Ōhata Shieri) while Yui Matsushima (松島 由依, Matsushima Yui) portrays her as a child.

Ohma Zi-O

Kamen Rider Ohma Zi-O (仮面ライダーオーマジオウ, Kamen Raidā Ōma Jiō), known simply as Ohma Zi-O (オーマジオウ, Ōma Jiō) or the "Lord" (魔王, Maō), is the dictator of Earth in the year 2068. His immense power convince Tsukuyomi and Geiz to travel back in time to 2018 and prevent his rise to power by intercepting his past self, Sogo. When Tsukasa sent Sogo and Tsukuyomi to 2068, Ohma Zi-O has them brought before him so he can mock his past self's naiveté and overpower him; advising him to renounce being Zi-O if he refused to accept his destiny of becoming him before sending him back to 2018. Along the way however, Sogo and his friends discovered that Ohma Zi-O is from a possible future and that his existence is fixed after a future where he was defeated by Geiz Revive came into existence. Furthermore, Sogo changed Ohma's Day (オーマの日, Ōma no Hi), the day he was supposed to become Ohma Zi-O, when he became Zi-O Trinity instead.

When Swartz initiated his endgame, Sogo traveled to 2068 to confront Ohma Zi-O for a final battle; deducing the tyrant never intended to kill him. The future Sogo reveals that his power to destroy time and space is stronger than Swartz's before sending his younger self back with a blank Ride Watch. While Sogo did become Ohma Zi-O in 2019, he chose to sacrifice the power to undo Swartz's damage. Impressed by his younger self's choice while expressing his joy from meeting him one last time, Ohma Zi-O peacefully lets himself be erased from existence.

In an alternate ending depicted in Over Quartzer, Ohma Zi-O's existence is revealed to be the result of the Quartzers' influence on Sogo's timeline; orchestrated by Sogo's original future counterpart, who intended to erase the Kamen Riders' influence on the Heisei era. Once he became aware of the Quartzers' plot, Ohma Zi-O supported his younger self in defeating their alternate self by giving him his personal Ride Watch.

The future Sogo transforms into Ohma Zi-O with a gold-colored variant of the Ziku-Driver known as the Ohma Zi-O Driver (オーマジオウドライバー, Ōma Jiō Doraibā). Like the Time Jackers, Ohma Zi-O has chronokinetic abilities, which are powerful enough to destroy an entire army of resistance fighters within seconds and summon a past Heisei Rider from their time period to his aid. While he possesses Ride Watches, he is able to tap into their individual powers by pressing their activation buttons.

• Ghost: The Ride Watch stolen from him by Geiz, later nullified by Decade.
• Drive: The Ride Watch stolen from him by Geiz. As it was a component in the Grand Zi-O Ridewatch, Ohma Zi-O was able to corrupt Kamen Rider Drive after his younger self summoned him during their first rematch.
• Kiva: This Ride Watch allows Ohma Zi-O to summon Kiva's Bloody Rose violin and manipulate a colony of energy bats.
• Ryuki: This Ride Watch summons Ryuki's contract monster Dragreder (ドラグレッダー, Doragureddā) to attack his target.
• Kuuga: This Ride Watch creates a giant energy projection of a Linto Hieroglyphic (リント文字, Rintomoji) that he can absorb and perform a Rider Kick-like attack.
• Blade: This Ride Watch summons giant Rouze Cards.
• Double: This Ride Watch summons green and purple cyclones.

Ohma Zi-O is voiced by Rikiya Koyama (小山 力也, Koyama Rikiya), while his civilian form is portrayed by Seiji Takaiwa (高岩 成二, Takaiwa Seiji).

Kasshine

Kasshine (カッシーン, Kasshīn) is a loyal mechanical servant of Ohma Zi-O, operated by a built-in AI unit, who was sent back in time to kill Geiz. After Sogo discarded his Ziku-Driver, Kasshine was rendered inoperable before Swartz reprogrammed it to kill the boy despite no longer being a threat to the Time Jackers, though Sogo was able to defeat it once he regained his powers.

Its main weapon is a spear, though it also utilizes mechanical limbs for additional support.

Kasshine is voiced by Kenjiro Tsuda (津田 健次郎, Tsuda Kenjirō).

Time Mazines

The Time Mazines (タイムマジーン, Taimu Majīn) are exo-suit mecha that served as support units for the resistance. Zi-O, Geiz, White Woz, and the Time Jackers all possess their own variants for time travel. The Time Mazine's development was said to have taken place as early as 2050, with Michal Minato using a prototype model emblazoned with his colors.

Dai Mazines

The Dai Mazines (ダイマジーン, Dai Majīn) are giant mecha controlled by Ohma Zi-O to conquer the world. According to Tsukuyomi, the Dai Mazines only appear on Ohma's Day, but as a result of changes in the timeline caused by Sogo's party and the Time Jackers alike, they appeared at the height of Christmas Eve. When Geiz destroyed Sougo's Ziku-Driver to remove Ohma Zi-O from existence, the Dai Mazines were deactivated, but descended into the ground.

Woz

The name "Woz" (ウォズ, Wozu) refers to two prophets from different futures who each herald their respective figures in hopes of ensuring the path to their respective futures. The name was originally held by Black Woz until White Woz's arrival in 2019, with Sogo providing distinction by labeling them with their outfits' predominant colors.

Both versions of Woz can use the BeyonDriver (ビヨンドライバー, Biyondoraibā) to become Kamen Rider Woz (仮面ライダーウォズ, Kamen Raidā Wozu) and use Ridewatches called MiRide Watches (ミライドウォッチ, Miraidowotchi) to access forms based on Future Kamen Riders called Futurerings (フューチャーリング, Fyūchāringu). White Woz was the original user of the BeyonDriver until Black Woz stole it from him.

Kamen Rider Woz's personal weapon is the Zikan Despear (ジカンデスピア, Jikan Desupia), which has a Yari Mode (ヤリモード, Yari Mōdo, Spear Mode) that can perform the Bakuretsu de Lance (爆裂DEランス, Bakuretsu De Ransu, Explosion of Lance) finisher, a Kama Mode (カマモード, Kama Mōdo, Scythe Mode) that can perform the Ichigeki Kaman (一撃カマーン, Ichigeki Kamān, One Strike Kaman) finisher, and a Tsue Mode (ツエモード, Tsue Mōdo, Cane Mode) that can perform the Fukashigi Magic (不可思議マジック, Fukashigi Majikku, Mysterious Magic) finisher.

• Woz: Woz's personal MiRide Watch that allows him to transform into Kamen Rider Woz's default form. His finisher in this form is the Time Explosion (タイムエクスプロージョン, Taimu Ekusupurōjon).
• Shinobi (シノビ): A MiRide Watch based on Kamen Rider Shinobi that equips Kamen Rider Woz with the Futurering Shinobi (フューチャーリングシノビ, Fyūchāringu Shinobi). In this form, he gains various ninja-related powers, such as making copies of himself and traveling through shadows. His finisher in this form is the Ninpō: Time Binding Jutsu (忍法 時間縛りの術, Ninpō Jikan Shibari no Jutsu).
• Quiz (クイズ, Kuizu): A MiRide Watch based on Kamen Rider Quiz that equips Kamen Rider Woz with the Futurering Quiz (フューチャーリングクイズ, Fyūchāringu Kuizu). In this form, he receives worldwide knowledge and the Quiz Shoulders (クイズショルダー, Kuizu Shorudā) that allow him determine the answer to a riddle for his targets. As the original Kamen Rider Quiz attacked through riddles, Woz did so as well while using this form. However, this ability can be negated if the riddle's answer is debatable or if Woz does not know the answer. His finisher in this form is the Quiz Shock Break (クイズショックブレイク, Kuizu Shokku Bureiku).
• Kikai (キカイ): A MiRide Watch based on Kamen Rider Kikai that equips Kamen Rider Woz with the Futurering Kikai (フューチャーリングキカイ, Fyūchāringu Kikai). In this form, he can transform nearby humans into manipulable Semi Humanoises (セミヒューマノイズ, Semi Hyūmanoizu) and use back-mounted robotic claws to attack his enemies. His finisher in this form is the Full Metal Break (フルメタルブレイク, Furu Metaru Bureiku).
• Ginga (ギンガ): A unique MiRide Watch based on Kamen Rider Ginga that grants Kamen Rider Woz his Ginga Finaly (ギンガファイナリー, Ginga Fainarī) form, which grants access to cosmic powers. Woz's finisher in this form is the Cho Ginga Explosion (超ギンガエクスプロージョン, Chō Ginga Ekusupurōjon, Super Galaxy Explosion). Woz also has two sub-forms in addition to his main form:
  • Ginga Wakusei Form (ギンガワクセイフォーム, Ginga Wakusei Fōmu, Ginga Planet Form), which allows him to control planetary energy. Woz's finisher in this sub-form is the Sui-Kin-Chi-Ka-Moku-Do-Ten-Kai Explosion (水金地火木土天海エクスプロージョン, Sui Kin Chi Ka Moku Do Ten Kai Ekusupurōjon, Mercury-Venus-Earth-Mars-Jupiter-Saturn-Uranus-Neptune Explosion).
  • Ginga Taiyo Form (ギンガタイヨウフォーム, Ginga Taiyō Fōmu, Ginga Sun Form), which allows him to control pyrokinetic energy. Woz's finisher in this sub-form is the Burning Sun Explosion (バーニングサンエクスプロージョン, Bāningu San Ekusupurōjon).

As they are the same person from different timelines, both versions of Woz are portrayed by Keisuke Watanabe (渡邊 圭祐, Watanabe Keisuke).

Black Woz

The primary timeline version of Woz, also known as Black Woz (黒ウォズ, Kuro Wozu), is a so-called "mysterious prophet" and member of the Quartzers who considers himself a devoted follower of Ohma Zi-O; possessing a book of prophecies called the Ohma Advent Calendar (逢魔降臨暦, Ōma Kōrin Reki) that details the history of his master's rise to power. He also took the role of narrator for the series and interacted with the viewers to recount Sogo's adventures.

After giving Sogo his powers and learning of his intention to become a benevolent lord instead of a tyrant, a surprised Black Woz nonetheless remained loyal to him as the latter's only concern was assuring Sogo's destiny as Ohma Zi-O regardless by providing his services and occasionally intervening to rescue the youth from harm. His dedication to ensuring his ruler's history initially made him fickle towards Sogo's friends and the Time Jackers, helping either side whenever Woz believed Sogo was straying too far from the intended path. When White Woz appeared, Black Woz became disgusted by his callous counterpart's conduct and lost his composure whenever he was around him. In fact, he hardly interacted with him unless it was to gloat over him when Sogo acquired a new power. He also encouraged Sogo to defeat Geiz to negate White Woz's history, but the youth never followed through on this.

After being attacked and wounded by Geiz Revive, Black Woz formed a temporary alliance with the Time Jacker Heure to steal White Woz's Rider powers so he can force Geiz into overusing his Revive form. Initially wanting to ensure Sogo's transition to Ohma Zi-O, the youth's influence on him caused Black Woz to support his decision to change his future. Because of this, once Sogo and Geiz settled their differences, Black Woz decided to make peace with Geiz and Tsukuyomi and move in with them and Sogo. He remained by Sogo's side throughout the rest of the series, helping him through numerous adventures such as helping him acquire his Zi-O Trinity form, rescuing Tsukuyomi from the Time Jackers, and battling Another Zi-O II.

When Swartz enacted his endgame to destroy time and space, Black Woz continued to fight by Sogo's side, though he was momentarily caught off-guard when Sogo became Ohma Zi-O to defeat Swartz then sacrificed the power to rewrite reality so he never became Ohma Zi-O. Despite this, Black Woz remained unaffected, as he continues to watch over Sogo in the new timeline.

In an alternate ending depicted in Over Quartzer, Black Woz betrayed Sogo and the others due to his allegiance to the Quartzers. However, after seeing that the future was not set in stone and due to his fondness for Sogo and the others, he ultimately returned to Sogo's side and fought beside him once more.

During the events of Kamen Rider Reiwa: The First Generation, Black Woz entered the World of Zero-One to help Sogo after the youth regained his Rider powers before joining Zero-One and the A.I.M.S. Riders in their fight against surviving Time Jacker, Finis, after they threatened the Kamen Rider multiverse. Once they were stopped, Zero-One asked Woz to warn Sogo's past self.

In Kamen Rider Zi-O Next Time: Geiz, Majesty, Black Woz joins forces with Geiz, Sogo, and Tsukuyomi when a new White Woz became Another Diend and attacked them. After Geiz Majesty defeated him, Black Woz absorbed the new White Woz's essence.

During the events Kamen Rider Zi-O: Final Stage, Black Woz was temporarily turned into the villainous and overzealous Tsukuyomi supporter, Red Woz (赤ウォズ, Aka Wozu), before returning to his senses.

Throughout the series, Black Woz has a habit of declaring "let's celebrate" (祝え, iwae) whenever Sogo obtained a new Ride Watch and Rider Armor; even being quite pleased when Sogo requested that he do so on one occasion and when he was ordered to when Sogo became Ohma Zi-O. While he usually does this for Sogo, he begrudgingly did it once for Geiz when he attained his Majesty form. He also demonstrated special skills such as deflecting Another Fourze's attack with one hand and using his scarf to teleport himself and others. Additionally, he can also travel through time without using a Time Mazine. Prior to obtaining Kamen Rider Woz's powers, Black Woz could use the Ohma Advent Calendar as a weapon to trap his target and destroy SOGO's time portals by ripping out the book's pages. In Kamen Rider Heisei Generations Forever, Black Woz was able to access Philip's Gaia Library to learn more about Imagin and give Sogo information about them.

White Woz

White Woz (白ウォズ, Shiro Wozu) is a version of Woz from an alternate future that came into being after Sogo temporarily renounced his powers. White Woz is fanatically devoted to Geiz, who by his time defeated Ohma Zi-O as Geiz Revive, and is determined to make sure it occurs. Despite sharing a common goal with Geiz and Tsukuyomi, White Woz's apathetic and sadistic approach puts them at odds. After getting MiRidewatches from three Future Kamen Riders, he used their combined power to create the Geiz Revive Ride Watch and present it to Geiz.

Not long after however, the Time Riders learned that White Woz only needed Geiz to defeat Ohma Zi-O to ensure his own existence, regardless if Geiz survives or not, and has been helping Swartz the entire time. During Geiz's ascension into Geiz Revive, White Woz was tricked into giving up his Rider powers to Black Woz. After Geiz and Sogo made peace with each other, White Woz began to fade away due to his timeline being erased. Despite this, he realized he should not have supported Swartz and combined his residual Rider energy with the Zi-O II and Geiz Revive Ride Watches to create the Zi-O Trinity Ride Watch before fully fading away; accepting his fate and warning his counterpart of Swartz's goals before he did. Weeks later, as part of the final phase for his endgame, Swartz summoned an Another World version of White Woz to distract Black Woz. However, the former learned the full extent of Swartz's plans and intended to tell the Time Riders, but vanished due to Another World's destruction before he could so so.

In Kamen Rider Zi-O Next Time: Geiz, Majesty, a White Woz born in a parallel reality influenced by Another Decade's Another World appeared in the rewritten timeline to steal Geiz's Rider powers and become a true savior. By providing an injured Daiki Kaito with his Ziku-Driver and Ride Watch, White Woz stole Kaito's Rider powers to become Another Diend and utilized several Kasshine units to attack Geiz's friends in an engineered act of heroism. After Geiz Majesty defeated him, this White Woz had his essence absorbed into Black Woz while Kaito got his powers back.

While he lacked Black Woz's abilities, the original White Woz possessed a tablet book-like device that allowed him to manipulate the flow of time and shift certain events' outcomes in his favor by simply writing or speaking whatever he wants to happen into it. This ability was so powerful that it could negate the Time Jackers' chronokinetic powers. Due to his home timeline being an alternate version of 2068, White Woz also had his own Time Mazine, which allowed him to travel to alternate timelines. Like Black Woz, White Woz also has a habit of declaring "let's celebrate", even though he only did it once when Geiz became Geiz Revive.

As Another Diend, White Woz had the ability to manipulate an army of Kasshine, summon past Heisei era monsters via card-like constructs, and was capable of performing his own version of Diend's Dimension Shoot finisher.

Time Jackers

The Time Jackers (タイムジャッカー, Taimu Jakkā) are a group of time travelers brought together by Swartz, who gifted his subordinates with the ability to freeze time, who initially sought to prevent Ohma Zi-O's existence by replacing him with an Another Rider. While claiming this goal is just, they are apathetic to the consequences of altering the timeline or are unconcerned by spoiling future events. The Time Jackers were eventually defeated by Sogo and rewritten to become his contemporaries in the new timeline.

During the events of Kamen Rider Reiwa: The First Generation, Finis, a previously unseen member who survived Sogo's rewriting of time, used the power of Another Zero-One to invade the World of Zero-One to lure out Sogo and steal his Rider powers, only to be defeated like her fellow Time Jackers.

Swartz

Swartz (スウォルツ, Suworutsu) is the cool-headed and ruthless leader of the Time Jackers and Tsukuyomi's older brother. Preferring to take the direct approach, he sees friend and foe alike as pawns in his schemes. Originally from an alternate version of 2058, Swartz sought to protect his reality by destroying all of the A.R. Worlds and rule all of time and space. In his youth, he was irate over being passed over to succeed his parents, whose power he intended to use in his goals. When Tsukuyomi attempted to stop him, he stranded her in Ohma Zi-O's time with no memory of her past.

After growing older, Swartz commenced a long-term plot by forming the Time Jackers and influencing Sogo's life by installing his dream of becoming king; orchestrating the events that would lead to him becoming Zi-O and create the ideal conditions for fulfilling his ambition. Swartz also orchestrated Hiryū becoming Another Zi-O II to capture Tsukuyomi and take her powers along with Tsukasa's; abandoning both the Time Jackers and Hiryū once they served their purpose as he initiated his A.R. World convergence. However, Swartz met his end when Sogo became Ohma Zi-O and destroyed him before using his powers to undo his damage. In the new timeline that followed, Swartz became Sogo's contemporary teacher.

Swartz possesses teleportation, memory manipulation, and powerful chronokinetic abilities that allow him to freeze time like Tsukuyomi. He could also travel to alternate timelines, something normal Time Mazines are incapable of doing, and bestow a weaker form of his time-based powers unto others, which he can take back at his leisure. Swartz later acquires the ability to become the monstrous Another Decade (アナザーディケイド, Anazā Dikeido). Able to manipulate Dimensional Walls like Tsukasa and Kaito, he could use them to attack or bind enemies as well as spirit people into his personal pocket dimension, Another World (アナザーワールド, Anazā Wārudo), so he can summon past Dark Riders who originated from alternate realities where they fulfilled their ambitions to take their place.

Swartz is portrayed by Kentarou Kanesaki (兼崎 健太郎, Kanesaki Kentarō) while Tenma Naruse (成瀬 天馬, Naruse Tenma) portrays him as a teenager.

Heure

Heure (ウール, Ūru) is the youngest member of the Time Jackers, whose childishness conceals his cruelty and arrogance as he manipulates his targets into forming Another Rider contracts by doing something for them to place them in his debt. Due to his infantile personality, he can quickly become displeased when things do not go his way, causing him to act in a more ruthless manner to ensure his success. After Swartz and Ora used him as a host for the parasitic Another Kikai, Heure became wary of his fellow Time Jackers as well as suspicious over his leader's true goals. As such, combined with his growing curiosity over the truth of "Ohma's Day", he became more willing to work with Black Woz. When Swartz revealed his true colors and took away his powers, Heure escaped with Ora to seek out the Time Riders' protection, only to be killed by her so she could ensure her own protection. After Sogo sacrificed his power as Ohma Zi-O to undo the Time Jackers' damage, Heure was revived as a contemporary classmate of Sogo's in the new timeline.

Like Ora, Swartz gifted Heure chronokinetic abilities, though he also demonstrated telekinetic powers. He piloted a personalized Time Mazine that resembled Kamen Rider Ghost's Captain Ghost, which could also transform into a copy of the Rider's Iguana Ghostriker.

Heure is portrayed by Rihito Itagaki (板垣 李光人, Itagaki Rihito).

Ora

Ora (オーラ, Ōra) is a female member of the Time Jackers with a calm, gentle disposition who prefers to use persuasion to form Another Rider contracts by exploiting targets in a state of emotional distress. While appearing outwardly gentle, her patience has its limits, especially when dealing with her fellow Time Jackers. After Swartz took her powers away to enact his own plans, a disillusioned Ora sided with Heure to seek out the Time Riders for protection until she learned she was being hunted by the Paradox Roidmude. Vengeful and frightened, she killed Heure and returned to Swartz in an attempt to kill him as well, only for Swartz to see through her plan and kill her instead. After Sogo undid the Time Jackers' damage, Ora was revived as a contemporary classmate of his in the new timeline.

Like Heure, Swartz gifted Ora chronokinetic abilities. She also piloted a personalized Time Mazine that resembled Kamen Rider Kiva's Castle Doran. After she lost her chronokinetic abilities, she used dark energy capable of obliterating targets.

Ora is portrayed by Ayaka Konno (紺野 彩夏, Kon'no Ayaka).

Another Riders

The Another Riders (アナザーライダー, Anazā Raidā), also known as Kaijin Riders (怪人ライダー, Kaijin Raidā), are monsters created by the Time Jackers as contenders for their version of Ohma Zi-O. In certain cases, the original history of a Kamen Rider can create Another Riders all on its own. Each Another Rider is created when a Time Jacker uses an Another Watch (アナザーウォッチ, Anazāwotchi) on a person, transforming them into a corrupted version of an established Showa, Heisei, or future era Kamen Rider. To defeat Another Riders, the Time Riders have to use a corresponding Ride Watch or one of their stronger forms. While the Time Jackers succeeded in having their Another Riders replace most of the Heisei era Riders in history, their damage was undone after Sogo used Ohma Zi-O's powers to rewrite time.

Hiryū Kakogawa

Hiryū Kakogawa (加古川 飛流, Kakogawa Hiryū) is a young man capable of transforming into the Another Rider, Another Zi-O (アナザージオウ, Anazā Jiō). Like Sogo, he is a survivor of the bus accident caused by Swartz, who abducted them and the other children due to their potential to become Zi-O. As a result, Hiryū develops a misguided vendetta against Sogo. After his first defeat as Another Zi-O, Hiryū felt insulted by Sogo's attempts to empathize with him and became more arrogant and ruthless as he proceeded to acquire all 19 Heisei Another Watches to become Another Zi-O II (アナザージオウⅡ, Anazā Jiō Tsū), only to be defeated by Sogo a second time. Following this, Swartz abandoned Hiryū while Daiki Kaito stole his Another Watch.

During the events of the stage show, Kamen Rider Zi-O: Final Stage, Hiryū joined forces with the remaining Quartzers and gained the means to become the second Kamen Rider Barlckxs before becoming Another Ohma Zi-O (アナザーオーマジオウ, Anazā Ōma Jiō) after he obtained the Ride Watches based on Kamen Riders One, Two, V3, Riderman, X, Amazon, and Stronger. While he managed to overwhelm the heroes with his new power, he was defeated by the combined efforts of Zi-O Ohma Form and Ohma Zi-O.

As Another Zi-O, Hiryū possesses Zi-O II's clairvoyance and a pair of clock hand-like swords, which he can combine into a naginata to perform a variation of Zi-O II's King Edge of Time Slash. He can also use the Heisei Another Riders' Another Watches to assume their forms. After becoming Another Zi-O II, Hiryū gained Grand Zi-O's chronokinetic powers and the ability to summon Another Riders from across time. His Another Watch, which was docked in a black version of the Ziku-Driver instead of being absorbed into his body, was able to be reconstituted until Kamen Rider Zi-O and Decade joined forces to destroy it.

Hiryū Kakogawa is portrayed by Yu Sakuma (佐久間 悠, Sakuma Yū) while Taiga Komie (込江 大牙, Komie Taiga) portrays him as a child.

Heisei Another Riders

• Another Build (アナザービルド, Anazā Birudo): An Another Rider based on Kamen Rider Build with the ability to shoot flaming basketballs from his hands, access the individual powers of Build's Rabbit and Tank Fullbottles, distill athletes' essences into Fullbottles (フルボトル, Furubotoru), and use them to augment himself. He was originally a young basketball player from 2017 whom Heure saved from his predestined death by car accident. One year later, Another Build attacked Sogo before being defeated after the latter transformed into Zi-O. However, Heure revived the monster; with his power increasing after each defeat. In response, Zi-O and Geiz traveled back to 2017 to defeat Another Build's past iteration. Following this, the basketball player was left with no memory of being Another Build, though his death was still averted due to Heure's earlier actions. The basketball player is portrayed by Taisei Mori (森 大成, Mori Taisei).
• Another Ex-Aid (アナザーエグゼイド, Anazā Eguzeido): An Another Rider based on Kamen Rider Ex-Aid and the Bugsters. He had the ability to perform inhuman feats based on platform games, travel into Game Worlds (ゲームの世界, Gēmu no Sekai), and summon Bugster Virus A (バグスターウイルスA, Bagusutā Uirusu Ē) foot soldiers to aid him. He was originally Iida (飯田), who created the "game that cannot be cleared by anyone" (誰もクリアしたことのないゲーム, Dare mo kuria shita koto no nai gēmu) to capture young boys and find a compatible heart donor for his son, Keisuke (ケイスケ), due to his hatred for doctors. After being defeated by Zi-O in 2016, Keisuke was put under Hiiro Kagami's care so he could be cured before his disease reached the heart transplant stage. Iida is portrayed by Takashi Kodama (児玉 貴志, Kodama Takashi).
• Ryūichi Sakuma (佐久間 龍一, Sakuma Ryūichi): A Ryusei School student who Ora gave the ability to become Another Faiz in 2003 to revive his childhood friend, Karin Yamabuki (山吹 カリン, Yamabuki Karin), and prolong her life by extracting bio-energy from girls who shared her age and birthdate. By the time Sakuma and Karin attended Amanogawa High School in 2011, he lost the ability to become Another Faiz. To make up for this, Swartz gave him the ability to become Another Fourze. After facing Zi-O in 2011 and Geiz in 2003, Sakuma was defeated in both timelines, realized he was hurting Karin more than he was helping her, and was forced to accept her death. Ryūichi Sakuma is portrayed by Atomu Mizuishi (水石 亜飛夢, Mizuishi Atomu).
  • Another Fourze (アナザーフォーゼ, Anazā Fōze): An Another Rider based on Kamen Rider Fourze and the Zodiarts. He can absorb or supply bio-energy and use the switches on his belt to summon Energy Modules (エネルギーモジュール, Enerugī Mojūru) based on Fourze's Modules.
  • Another Faiz (アナザーファイズ, Anazā Faizu): An Another Rider Based on Kamen Rider Faiz who is also able to absorb bio-energy, though he can also summon a red aura to perform a Rider Kick-like attack. This was Sakuma's original Another Rider form until it died out in 2011 and was revived following Another Fourze's defeat.
• Another Wizard (アナザーウィザード, Anazā Wizādo): An Another Rider based on Kamen Rider Wizard armed with a ring that lets him channel the abilities of his template's Wizard Rings. He was originally Hayase (早瀬), who wanted to use his powers to support the theater he worked at and impress its owner, Kaori Kinoshita (木ノ下 香織, Kinoshita Kaori), whom he had a crush on. Due to his inability to confess his feelings however, Kaori became engaged to another man, causing Hayase to seek revenge. After Geiz intercepted his past self in 2012 and destroyed his Another Watch, he and Sogo helped the present Hayase make contact with himself across time and encourage his past self to confess his feelings regardless of what happens. Hayase is portrayed by Zuimaro Awashima (粟島 瑞丸, Awashima Zuimaro).
• Another OOO (アナザーオーズ, Anazā Ōzu): An Another Rider based on Kamen Rider OOO. See Kuroto Dan.
• Another Gaim (アナザー鎧武, Anazā Gaimu): An Another Rider based on Kamen Rider Gaim and the Over Lords. He is armed with a zanbatō, the ability to create zipper-like portals, or Cracks, that connect to a pseudo-Helheim (ヘルヘイム, Heruheimu) pocket dimension, and command over an army of Inves-like monsters. He was originally Asura (アスラ) of the dance group Team Baron before he was ousted by his leader, Kaito Kumon in 2013. After becoming Another Gaim, Asura took over Team Baron and banished anyone who challenged him to Helheim. Though he was defeated by Zi-O in 2013, this was undone by the "Man of the Beginning" so Sogo could rescue Geiz after he was sent to Helheim. Once he did, the future Sogo returned to 2013 to defeat Another Gaim permanently while his present self did the same. Asura is portrayed by Yuuki Tomotsune (友常 勇気, Tomotsune Yūki).
• Another Ghost (アナザーゴースト, Anazā Gōsuto): An Another Rider based on Kamen Rider Ghost who can use his chest-mounted eye to absorb human souls for use as a hoodie armament, summon Gamma Commando-like familiars and Hoodie Ghosts for support, and perform a Rider Kick-like attack. He was originally Makimura (マキムラ), a policeman from 2015 who was killed in the line of duty and forced to become Another Ghost after refusing Heure's offer to be saved. He used his powers to prevent accidents by targeting their instigators before his death was averted and he was defeated by defeated by Zi-O. Makimura is portrayed by Naotaka Horiike (堀池 直毅, Horiike Naotaka).
• Another Den-O (アナザー電王, Anazā Den'ō): An Another Rider based on Kamen Rider Den-O who possesses four swords and can travel through time on the Another DenLiner (アナザーデンライナー, Anazā Denrainā) bullet train.
  • The first Another Den-O the Time Riders encountered was Ataru Hisanaga, who was used by the Super Time Jacker Tid and defeated by the original Kamen Rider Den-O in 2018 during the events of Kamen Rider Heisei Generations Forever.
  • The second Another Den-O was originally Takuya Endō (遠藤 タクヤ, Endō Takuya), who blamed the death of his late sister, Sayuri (サユリ), on her remorseful boyfriend, Yukihiro Ōsumi (大澄 ユキヒロ, Ōsumi Yukihiro). After Ora turned him into Another Den-O in 2019, Takuya attempted to steal Den-O's DenLiner so he can go back in time to 2017 and prevent Sayuri's death. While in the past and fending off the Time Riders, Den-O, Kamen Rider Zeronos, and a Mole Imagin that Yukihiro unintentionally formed a contract with, the past Takuya learned his sister's death was caused by his future Another Rider self. His future self gained assistance from a pack of Mole Imagin before they were defeated by Grand Zi-O, Den-O, and Zeronos while past Takuya reconciled with Yukihiro. Takuya Endō is portrayed by Dai Goto (後藤 大, Gotō Dai).
• Another Double (アナザーW(ダブル), Anazā Daburu): An Another Rider based on Kamen Rider Double capable of manipulating wind and tapping into the Luna Gaia Memory's power. During the events of Kamen Rider Heisei Generations Forever, he was created from an unknown person to serve Tid as his second-in-command, leading past monster combatants and transforming Ataru into Another Den-O before he was destroyed by Zi-O. Another Double is voiced by Kentarō Itō (伊藤 健太郎, Itō Kentarō).
• Another Kuuga: An Another Rider based on Kamen Rider Kuuga and the Grongi. See Tid.
• Another Ryuga (アナザーリュウガ, Anazā Ryūga): Also known as Kamen Rider Ryuga, he originally existed outside of the primary Kamen Rider timeline before Heure summoned him so he could turn him into an Another Rider version of himself.
• Another Ryuki: An Another Rider based on Kamen Rider Ryuki. See Tatsuya Kanō.
• Another Blade (アナザーブレイド, Anazā Bureido): An Another Rider based on Kamen Rider Blade. See Amane Kurihara.
• Another Agito (アナザーアギト, Anazā Agito) Army: A zombie-like Time Jacker variant based on the original Another Agito.
• Another Hibiki (アナザー響鬼, Anazā Hibiki): An Another Rider based on Kamen Rider Hibiki and the Makamou. He was originally Tsutomu Tsuzumiya (鼓屋 ツトム, Tsuzumiya Tsutomu), a disciple of the current Kamen Rider Hibiki, Kyosuke Kiriya, as well as Sogo's childhood friend. After Tsutomu left Kiriya because his master felt he was inadequate to take on the Hibiki title from his master, Tsuzumiya was unwillingly turned into Another Hibiki despite wanting to become an oni in his own right. Once Kiriya accepted his responsibilities and became Kamen Rider Hibiki, he and Zi-O Trinity save Tsutomu and Kiriya reconciles with his student. Tsutomu Tsuzumiya is portrayed by Rihito Noda (野田 理人, Noda Rihito) while Yura Sato (佐藤 結良, Satō Yura) portrays him as a child.
• Another Kiva (アナザーキバ, Anazā Kiba): An Another Rider based on Kamen Rider Kiva and the Fangire. She commands Kiva's Arms Monsters and can wield them in their weapon forms. She was originally Yūko Kitajima (北島 祐子, Kitajima Yūko), who became a serial killer in 2015 after being dumped by her ex-boyfriend Tetsuya Tagami (田上 哲也, Tagami Tetsuya) and beating his new girlfriend to death. Ora exploited her situation to turn Yūko into Another Kiva, but the latter's unstable mind made her immune to the Time Jackers' control. After nearly manipulating Sogo into serving her, Geiz saved him before Black Woz defeated her. Following this, Ora killed Yūko, who died in Sogo's arms. Yūko Kitajima is portrayed by Yumiko Shaku (釈 由美子, Shaku Yumiko).
• Another Kabuto (アナザーカブト, Anazā Kabuto): An Another Rider based on Kamen Rider Kabuto and the Worms. See Sou Yaguruma.
• Another Decade: An Another Rider based on Kamen Rider Decade and Chinomanako Diend. See Swartz.
• Another Drive (アナザードライブ, Anazā Doraibu): An Another Rider based on Kamen Rider Drive, Mashin Chaser, and the Roidmudes. See Paradox.
• Another Diend (アナザーディエンド, Anazā Diendo): An Another Rider based on Kamen Rider Diend and Chinomanako Diend. See White Woz.

Post-Heisei Another Riders

• Another Shinobi: Also known as Kamen Rider Shinobi, a future Rider who Sougo brought into existence. Swartz coerced Heure to turn Shinobi's present-day counterpart into an Another Rider version of himself.
• Another Quiz (アナザークイズ, Anazā Kuizu): An Another Rider based on Kamen Rider Quiz who has the power to steal other people's intelligence and enhance his own. He was originally the father of Kamen Rider Quiz, Tamotsu Dōan (堂安 保, Dōan Tamotsu), a scientist obsessed with advancing his work; to the point where he neglected his family and used his powers as Another Quiz to steal other researchers' knowledge. He was defeated by White Woz. Tamotsu Dōan is portrayed by Yoichiro Saito (斉藤 陽一郎, Saitō Yōichirō).
• Another Kikai (アナザーキカイ, Anazā Kikai): An Another Rider based on Kamen Rider Kikai with its template's powers, the ability to conjure vines from its hands, fly, and fire missiles. Its true form is a parasitic insect that becomes its face, which could survive upon every defeat and latch onto any form of organic matter to recreate its Another Rider body. As a result of Sougo's innate ability to create alternate futures, he inadvertently created Another Kikai as a counterpart to Kamen Rider Kikai. The Another Rider became a target of the Time Jackers, who sought its Another Watch, but the Time Riders were able to retrieve its MiRide Watch so White Woz could permanently defeat Another Kikai.
• Another Zero-One (アナザーゼロワン, Anazā Zero Wan): An Another Rider based on Kamen Rider Zero-One and the Magias. See Will.

Shōwa Another Riders

• Another One: An Another Rider based on Kamen Rider One, an alternate universe version of One, and Kamen Rider Core. See Finis.

Future Kamen Riders

Unlike the primary timeline’s future Kamen Riders, such as Michal Minato, these Kamen Riders originate from possible future timelines that came into being due to Sogo's growing strength as Zi-O and gaining the ability to create such time periods. While each of the future Riders happen to share the same Mirai Driver (ミライドライバー, Mirai Doraibā, Future Driver), they have different names and Driver attachments in each time period.

Rentarō Kagura

Rentarō Kagura (神蔵 蓮太郎, Kagura Rentarō) is a ninja from 2022 who can transform into Kamen Rider Shinobi (仮面ライダーシノビ, Kamen Raidā Shinobi). By his time, Rentarō was chosen by his mentor, Master Gamano, to become Shinobi. Despite his proficiency in using ninjutsu and being able to defeat fellow ninja Rider Hattari, he was forced to play the role of a hapless ninja in order to hide his secret identity and defend his little sister Iroha until she turned 18.

Rentarō transforms with the Shinobi Driver (シノビドライバー, Shinobi Doraibā) in conjunction with the Menkyo Kaiden Plate (メンキョカイデンプレート, Menkyo Kaiden Purēto) integrated into the Shuriken Starter (シュリケンスターター, Shuriken Sutātā). As Shinobi, he uses ninjutsu and elemental attacks and wields a ninjatō as his primary weapon. His finisher is the Finish Ninpō (フィニッシュ忍法, Finisshu Ninpō).

In 2019, Rentarō was an ordinary man who longed to protect the weak, as he had a personal stake due to a troubled life as a weakling himself. However, he harbored vengeful feelings towards bullies. Heure used this to turn him into Another Shinobi (アナザーシノビ, Anazā Shinobi), granting him the abilities of his future self. Though he was able to overcome his personal demons following Sogo’s encouragement, Swartz brainwashed Rentarō into turning back into Another Shinobi before he is defeated and saved by White Woz.

Rentarō Kagura is portrayed by Hideya Tawada (多和田 任益, Tawada Hideya).

Mondo Dōan

Mondo Dōan (堂安 主水, Dōan Mondo) is a genius riddle enthusiast from 2040 who can transform into Kamen Rider Quiz (仮面ライダークイズ, Kamen Raidā Kuizu) with the Quiz Driver (クイズドライバー, Kuizu Doraibā) in conjunction with the Quiz Topper (クイズトッパー, Kuizu Toppā) card. In battle, he asks his enemies questions that can determine the outcome of the battle depending on how they answer. His finisher is the Final Quiz Flash (ファイナルクイズフラッシュ, Fainaru Kuizu Furasshu).

White Woz helped Mondo travel to 2019 to find his missing father, who disappeared before he was born. After fighting and working with the Time Riders to defeat Another Quiz, Mondo reconciled with his father and eventually returned to his time.

Mondo Dōan is portrayed by Katsuhiro Suzuki (鈴木 勝大, Suzuki Katsuhiro).

Rento Makina

Rento Makina (真紀那 レント, Makina Rento) is a Humanoise (ヒューマノイズ, Hyūmanoizu) from the year 2121 who can transform into Kamen Rider Kikai (仮面ライダーキカイ, Kamen Raidā Kikai) with the Kikai Driver (キカイドライバー, Kikai Doraibā) in conjunction with the wrench-shaped Spannerder (スパナーダー, Supanādā) and screwdriver-shaped Screwder (スクリューダー, Sukuryūdā). Due to being solar powered, Rento makes use of a satellite that stores and replenishes him with solar energy. He can perform three finishers: the Kikai de Hakaider (キカイデハカイダー, Kikai De Hakaidā), the Ultimetal Finish (アルティメタルフィニッシュ, Arutimetaru Finisshu), and Full Metal the End (フルメタル・ジ・エンド, Furu Metaru Ji Endo).

Rento was part of a group of human-like androids called "Humanoises", who took over the world and hunted humanity to near extinction by 2121. After meeting a group of children, Rento befriended them and defected to defend humanity. When his satellite was hacked, Rento was reprogrammed back to his original state until Zi-O rendered him inactive. Using a password Rento's friends provided, Sogo restored the android's programming. Unlike the other future Riders, Rento was modeled after Sogo's robot toy, his sole "companion" during his childhood.

Rento Makina is portrayed by Jingi Irie (入江 甚儀, Irie Jingi).

Kamen Rider Ginga

Kamen Rider Ginga (仮面ライダーギンガ, Kamen Raidā Ginga) is a malevolent extraterrestrial Kamen Rider who transforms with the Ginga Driver (ギンガドライバー, Ginga Doraibā) and can perform three finishers: {the {nihongo4|Gigantic Ginga|ギガンティックギンガ|Gigantikku Ginga}}, Dynamite Sunshine (ダイナマイトサンシャイン, Dainamaito Sanshain), and Strike the Planet Nine (ストライクザプラネットナイン, Sutoraiku Za Puranetto Nain).

Ginga was born from a space-time disruption who arrived on Earth in 2019 intending to rule the universe with his unfathomable powers. In response, the Time Riders, the Time Jackers, and Another Kiva temporarily joined forces to drive Ginga back to his home timeline.

Kamen Rider Ginga is voiced by Tomokazu Sugita (杉田 智和, Sugita Tomokazu).

Returning characters

Main article: List of returning characters in Kamen Rider Zi-O

As a special anniversary series, Kamen Rider Zi-O features cameos from actors of past Kamen Rider series from the Heisei era reprising their roles. While most characters appear in two episodes or the movies, the protagonists of Kamen Rider Decade play a more prominent role as reoccurring side characters directly involved in the series' plotline.

Film-exclusive characters

Futaros

Futaros (フータロス, Fūtarosu) is a benevolent Imagin who appears in Kamen Rider Heisei Generations Forever. He forged a contract with Ataru Hisanaga to save his host's brother, Shingo, in the past. To grant Ataru's wish, he brought Sogo, Sento Kiryu, and some of their friends to his host's world until Tid kidnapped Shingo. When the contract was completed after a desperate Ataru told Futaros to end it during Tid's invasion, he traveled back in time to January 29, 2000. He, along with Sogo and Ataru, tried to save Shingo from Another Double, but Tid captured the brothers. After the final battle and the Hisanaga brothers were returned safely, Futaros left for parts unknown.

Futaros is voiced by Kenichi Takitō (滝藤 賢一, Takitō Ken'ichi).

Hisanaga brothers

The Hisanaga brothers who, as a result of Tid's actions, live in world where the Heisei Kamen Riders exist as fictional characters. They appear exclusively in Kamen Rider Heisei Generations Forever.

Ataru Hisanaga

Ataru Hisanaga (久永 アタル, Hisanaga Ataru) is a high school student and a Heisei Kamen Rider fan from the year 2018. He forged a contract with Futaros to meet Kamen Riders and leave his reality behind as his parents were more worried about his missing brother, Shingo. When he and Sogo traveled back in time while following Futaros to find Shingo however, Ataru was forcibly transformed into Another Den-O (アナザー電王, Anazā Den'ō). Due to Kamen Rider Den-O's status as a singularity, he and the original DenLiner crew were unaffected by the changes, allowing them to defeat Another Den-O and save Ataru.

Ataru Hisanaga is portrayed by Nayuta Fukuzaki (福崎 那由他, Fukuzaki Nayuta).

Shingo Hisanaga

Shingo Hisanaga (久永 シンゴ, Hisanaga Shingo) is Ataru's 7-year-old older brother from the year 2000 who was abducted by Tid and his Another Riders due to his status as a singularity. After escaping the Another Den-Liner on December 3, 2018, he encountered the Kamen Riders and Ataru while being pursued by the Another Riders. Shingo was eventually caught by the Another Riders and sealed by Tid, though he was saved by the Heisei Kamen Riders. After the final battle, he was returned to his own time.

Shingo Hisanaga is portrayed by Taiyo Saito (斎藤 汰鷹, Saitō Taiyō).

Tid

Tid (ティード, Tīdo) is a Super Time Jacker (スーパータイムジャッカー, Sūpā Taimu Jakkā) who is able to brainwash and manipulate his targets. Unlike the other Time Jackers, Tid's master plan was to erase the history of all Heisei Kamen Riders and become the ruler of the world. To do this, he created the Kuuga Another Watch, which allowed him to transform into the giant Another Kuuga (アナザークウガ, Anazā Kūga), so he can abduct and seal away Shingo, whose status as a singularity made him a potential threat to his plans. After being defeated by Zi-O and Build, Tid used his Another Watch on Shingo to absorb him and evolve his Another Rider form into the larger, four-armed Another Ultimate Kuuga (アナザーアルティメットクウガ, Anazā Arutimetto Kūga). However, he was ultimately defeated by the 20 Heisei Kamen Riders, killing him and saving Shingo as a result. He appears exclusively in Kamen Rider Heisei Generations Forever.

As Another Kuuga, he could fly and battle the Time Riders in their Time Mazines. As Another Ultimate Kuuga, he gained the ability to fire a powerful beam from his mouth and create past monster combatants.

Tid is portrayed by Shunsuke Daitō (大東 駿介, Daitō Shunsuke).

Oda Nobunaga

Oda Nobunaga (織田 信長) is an infamous warlord from Japan's Sengoku period as well as the original bearer of the “Lord” title, whom Sogo idolized and hoped to emulate. Before appearing in Kamen Rider Zi-O the Movie: Over Quartzer, Nobunaga made indirect appearances in the Kamen Rider series through a Cell Medal clone in Kamen Rider × Kamen Rider OOO & W Featuring Skull: Movie War Core and one of the fifteen heroic Eyecons in Kamen Rider Ghost.

The Oda Nobunaga of Kamen Rider Zi-O is portrayed by Tomoya Maeno (前野 朋哉, Maeno Tomoya).

Gyūzō

Gyūzō (牛三) is a ninja who serves under Nobunaga and appears exclusively in Kamen Rider Zi-O the Movie: Over Quartzer.

Gyūzō is portrayed by Jiei Wakabayashi (若林 時英, Wakabayashi Jiei)

Clara Steinbelt

Clara Steinbelt (クララ・スタインベルト, Kurara Sutainberuto) is an ancestor of Krim Steinbelt from the Sengoku period who appears exclusively in Kamen Rider Zi-O the Movie: Over Quartzer. Realizing that time had been distorted and after learning of the existence of the Quartzers' attempts to kill her, her descendant Krim and his ally Kamen Rider Mach asked Sogo and his friends to protect Clara.

Clara Steinbelt is portrayed by Eru Aoba (蒼葉 える, Aoba Eru)

Quartzers

The Quartzers (クォーツァー, Kwōtsā) are a mysterious group who view themselves as history's overseers and appear primarily in Kamen Rider Zi-O the Movie: Over Quartzer. The three leading Quartzers possess Ziku-Drivers that allow them to become Kamen Riders and utilize Ride Watches based on Kamen Riders whose media aired during the Heisei period but are recognized as Shōwa period Riders.

The minor six Quartzer members are portrayed by YORI, TOMO, KIMI, U-YEAH, KENZO, and DAICHI of the boy band Da Pump.

Leader of Quartzers

SOGO Tokiwa (常磐 SOUGO(ソウゴ), Tokiwa Sōgo), initially referred to as the Leader of Quartzers (クォーツァーのリーダー, Kwōtsā no Rīdā), is the original older iteration of Sogo Tokiwa and the King of Time who established the conditions to bring about Ohma Zi-O. He used his alternate self as a kagemusha to secretly reshape the Heisei era to his liking and prevent Sogo from becoming Grand Zi-O. SOGO was destroyed by Zi-O Ohma Form and the Heisei Kamen Riders; negating his influence in Ohma Zi-O's creation.

SOGO can transform into Kamen Rider Barlckxs (仮面ライダーバールクス, Kamen Raidā Bārukusu), who utilizes three Ride Watches based on Kamen Rider Black RX and his two alternate forms and wields a weapon similar to the Shōwa Rider's Revolcane. Similar to Ohma Zi-O, Barlckxs can utilize the power of Ride Watches by pressing their activation buttons, such as combining Bio Rider and J's so he could transform into a liquefied Jumbo Formation (ジャンボフォーメーション, Janbo Fōmēshon). His finishing move is his own variation of the Time Break.

SOGO Tokiwa is portrayed by ISSA of Da Pump.

Kagen

Kagen (カゲン) is a high-ranking Quartzer who can transform into Kamen Rider Zonjis (仮面ライダーゾンジス, Kamen Raidā Zonjisu). He was destroyed by Kamen Rider Zero-One.

As Zonjis, he utilizes three Ride Watches based on the last three Shōwa Kamen Riders who debuted in the early Heisei era: Kamen Riders Shin, ZO, and J. Unlike the other Quartzer Riders, Zonjis fights with brute strength in combat and can remove his armored cape to increase his offensive capabilities. He can also utilize Barlckx's Robo Rider Ridewatch to fire a barrage of missiles.

Kagen is portrayed by Papaya Suzuki (パパイヤ鈴木, Papaiya Suzuki).

Jōgen

Jōgen (ジョウゲン) is a high-ranking Quartzer member who can transform into Kamen Rider Zamonas (仮面ライダーザモナス, Kamen Raidā Zamonasu). He is destroyed by Geiz and six of the Heisei Kamen Riders.

As Zamonas, he wields a crossbow, can summon a Castle Doran-themed Time Mazine like Ora, and utilizes three Ride Watches based on the three protagonists of the Shōwa era-themed Heisei era web series Kamen Rider Amazons: Kamen Riders Amazon Omega, Amazon Alpha, and Amazon Neo.

Jōgen is portrayed by Syuusuke Saito (斉藤 秀翼, Saitō Shūsuke).

Finis

Finis (フィーニス, Fīnisu) is a non-binary surviving member of the Time Jackers who sought to erase all Kamen Riders from history, believing that they are inherently evil. During the events of Kamen Rider Reiwa: The First Generation, Finis accomplished their goal by traveling to the World of Zero-One and recruiting the HumaGear Will to create an alternate timeline and attract Sogo. Despite absorbing most of his Rider powers and becoming the giant Another One (アナザー1号, Anazā Ichigō), Finis was ultimately destroyed by the combined efforts of Kamen Riders Zi-O and Zero-One.

As Another One, they had a motorcycle-like lower body from the torso down. After absorbing Geiz's Time Mazine, Another One evolved into Another New One (アナザー新1号, Anazā Shin Ichigō); acquiring a red and white color scheme and grasshopper appendages replacing the motorcycle.

Finis is portrayed by Rina Ikoma (生駒 里奈, Ikoma Rina). As Another One, they are voiced by Kōji Ishii (石井 康嗣, Ishii Kōji).

Rider Time-exclusive characters

Iroha Kagura

Iroha Kagura (神蔵 紅芭, Kagura Iroha) is Rentarō's 17-year-old younger sister who admires Shinobi, unaware that her idol and older brother are the same person. As she is also the princess of the evil Niji no Hebi clan, Rentarō strives to protect her. Like her brother, she is a ninja proficient in ninjutsu and skilled with using shuriken.

Iroha Kagura is portrayed by Asuka Hanamura (華村 あすか, Hanamura Asuka).

Isamichi Konjō

Isamichi Konjō (今生 勇道, Konjō Isamichi) is Rentarō's childhood friend and son of the Konjō Company's (今生カンパニー, Konjō Kanpanī) CEO who can transform into Kamen Rider Hattari (仮面ライダーハッタリ, Kamen Raidā Hattari). He harbors affections for Iroha, but after learning she only has eyes for Shinobi, he decides to defeat him in order to gain her love. When the Konjō Company hosted a tournament, Isamichi was forced to sabotage Iroha's examination due to said company forbidding nepotism. Later on, he joined forces with Shinobi when the Niji no Hebi targeted her.

Much like the other Future Kamen Riders, Isamichi also has his own Mirai Driver, dubbed the Hattari Driver (ハッタリドライバー, Hattari Doraibā). As Hattari, and similarly to Shinobi, he utilizes elemental attacks and a ninjatō in battle, though he can also summon ninjas to aid him. His finisher is the Fantastic Ninpo (ファンタスティック忍法, Fantasutikku Ninpō).

Isamichi Konjō is portrayed by Takuma Zaiki (財木 琢磨, Zaiki Takuma).

Master Gamano

Master Gamano (ガマノ師匠, Gamano-shishō) is Rentarō's mentor who selected the youth to become Kamen Rider Shinobi after saving him. Having observed the Kagura family as a frog caricature and despite choosing him, Gamano views Rentarō as expendable to his agenda and left to recruit several more ninja Riders.

Master Gamano is portrayed by Nobuo Kyo (姜 暢雄, Kyō Nobuo).

Yaminin

Yaminin (闇忍) is a mysterious ninja from an evil ninja faction known as Niji no Hebi (虹蛇, Rainbow Serpent) who was responsible for turning Japan into a ninja-based country through the government by 2022. Despite being unaware of Iroha being their group's princess, Yaminin developed an affection for her and infiltrated a competition held by the Konjō Company to kidnap her. After being defeated and spared by Shinobi and Hattari, Yaminin promised to return in the future.

Yaminin is voiced by Masashi Ebara (江原 正士, Ebara Masashi).

Sara

Sara (サラ) is a young woman who was accidentally hit by her boyfriend Tatsuya in a car accident and was left hospitalized. After he became Another Ryuki and her soul became trapped in the Mirror World, she set up a Rider War to find someone to stop him. Before she died of her injuries, she begged Shinji Kido to save Tatsuya.

Sara is portrayed by Mayu Ura (浦 まゆ, Ura Mayu).

Tatsuya Kanō

Tatsuya Kanō (加納 達也, Kanō Tatsuya) is a young man who inadvertently injured his girlfriend Sara in a car accident. Recognizing his plight, Kamen Rider Odin turned him into the Another Rider, Another Ryuki (アナザー龍騎, Anazā Ryūki) so he could steal people's souls in order to save Sara with a soul gem. After learning Sara's soul had become trapped in the Mirror World and that she had set up a Rider War to find someone to stop him, Tatsuya became disheartened; realizing all he had done was for naught as he was only hurting Sara further. When she died, Odin saw no more use for his pawn and sent him into a berserker state before Zi-O saved him.

As Another Ryuki, he has similar powers as Another Ryuga and his original template.

Tatsuya Kanō is portrayed by Shun Ishida (石田 隼, Ishida Shun).

Mirror World Kamen Riders

• Kimura (木村): A young man who became the new Kamen Rider Verde (仮面ライダーベルデ, Kamen Raidā Berude) in Sara's Rider War and sided with Shinji Kido, Miyuki Tezuka, and Ishida. Even though he and his team were betrayed by Tezuka and ambushed by Ouja and Zolda, Kimura survived. After learning the truth about Ryuga, Kimura attempted to warn Shinji, but failed to stop Ryuga from possessing Shinji and beating Kimura before leaving him to be eaten by a Mirror Monster horde. Kimura is portrayed by Daichi Yamaguchi (山口 大地, Yamaguchi Daichi).
• Ishida (石田): A young man who became the new Kamen Rider Imperer (仮面ライダーインペラー, Kamen Raidā Inperā) in Sara's Rider War. He sided with Shinji Kido, Miyuki Tezuka, and Kimura, only to be murdered by a traitorous Tezuka. Ishida is portrayed by Ryo Shinoda (篠田 諒, Shinoda Ryō).
• Ishibashi (石橋): A young man who became the new Kamen Rider Scissors (仮面ライダーシザース, Kamen Raidā Shizāzu). He sided with Jun Shibaura, Totsuka, and Tezuka before Shibaura and Tezuka silently killed him while having lunch. Ishibashi is portrayed by Ken Nakajima (中島 健, Nakajima Ken).
• Totsuka (戸塚): A young man who became the new Kamen Rider Tiger (仮面ライダータイガ, Kamen Raidā Taiga) in Sara's Rider War. He sided with Jun Shibaura and Ishibashi before he was killed by Kamen Rider Ouja. Totsuka is portrayed by Ken Sugawara (菅原 健, Sugawara Ken).
• Unnamed man: A middle-aged man who became the only known version of Kamen Rider Abyss (仮面ライダーアビス, Kamen Raidā Abisu) in the primary Kamen Rider timeline after Sara recruited him for her Rider War. He was killed by Kamen Rider Knight. The unnamed man is portrayed by Kenji Tominaga (富永 研司, Tominaga Kenji) and voiced by Yasunao Sakai (坂井 易直, Sakai Yasunao).

Misa Kuon

Misa Kuon (久遠 ミサ, Kuon Misa) is a girl.

Misa Kuon is portrayed by Rena Takeda (武田 玲奈, Takeda Rena).

External links

• Cast on TV Asahi