Kamen Rider Den-O (仮面ライダー電王) is a Japanese tokusatsu series that serves as the 17th installment in the Kamen Rider franchise and the eighth entry in the Heisei era.

Main characters

Ryotaro Nogami

Ryotaro Nogami (野上 良太郎) is an optimistic yet unlucky young man who becomes Kamen Rider Den-O after picking up a Rider Pass (ライダーパス) and being convinced by Hana to help mankind. Over the course of the series, he discovers that he is a Singularity Point (特異点), an individual who can overpower Imagin attempting to possess him, exist outside of time, and is largely immune to timeline changes. Additionally, he forms bonds with Imagin who disagree with their kind's methods and allow him to assume stronger forms. Utilizing a Rider Pass in conjunction with the Den-O Belt (デンオウベルト), Ryotaro can transform into the base Kamen Rider Den-O Plat Form (プラットフォーム). While transformed, he can perform Full Charge (フルチャージ) finishers. He also wields the DenGasher (デンガッシャー), which can be reconfigured into varying forms. Due to his lack of combat prowess and Plat Form's lack of offensive abilities, Ryotaro initially allows his Imagin partners to possess him and assume combat-oriented forms tailored to their fighting styles. Later in the series, he acquires the K-Taros (ケータロス) cellphone, which allows him to fuse with all of his Imagin partners at once to assume Climax Form (クライマックスフォーム), and the DenKamen Sword (デンカメンソード), which he can combine with a Rider Pass to assume Liner Form (ライナーフォーム) and use to channel his Imagin partners' powers. During the events of the film Saraba Kamen Rider Den-O: Final Countdown, Ryotaro is possessed by the Ghost Imagin, who forces him to utilize a Rider Pass in conjunction with the Yuuki Belt to transform into Kamen Rider Yuuki Skull Form (スカルフォーム). While transformed, he wields the Ghost Imagin's sword, which allows him to perform the Terminate Flash (ターミネイトフラッシュ) Full Charge. Ryotaro is portrayed by Takeru Satoh (佐藤 健).

Kotaro

"Kotaro" (小太郎), as nicknamed by Hana, is Ryotaro's 11-year-old self who appears exclusively in the film Kamen Rider Den-O: I'm Born!. While living with his grandmother, he occasionally snuck out to cope with losing his parents. During one such excursion, he encounters the DenLiner crew amidst their efforts to stop Gaoh and ends up being possessed by Momotaros, who uses him to transform into a smaller version of Kamen Rider Den-O called "Kamen Rider Mini Den-O" (仮面ライダーミニ電王) to fight Gaoh's forces due to the present Ryotaro's memory loss voiding their contract. Following the battle, the DenLiner crew take Kotaro to see his parents during his birth before returning him to his proper time period. Kotaro is portrayed by Takuya Mizoguchi (溝口 琢矢), who also portrays the de-aged Ryotaro in the Cho-Den-O series.

Hana / Kohana

Hana (ハナ) is a Singularity Point, passenger of the DenLiner, daughter of Airi and Yuto, and niece of Ryotaro who originates from a future that the Imagin destroyed. As the sole survivor, she vowed revenge on the Imagin and joined the DenLiner's crew to protect the timeline from them. In pursuit of this goal, she convinces Ryotaro to become Kamen Rider Den-O and often serves as an enforcer to keep his Imagin partners in line, though she eventually comes to see them in a better light. As her future is gradually recreated, Hana physically regresses to her childhood self and assumes the alias of Kohana (コハナ), though she stays on the DenLiner and later becomes a member of the DenLiner Police to continue protecting the timeline. Hana is portrayed by Yuriko Shiratori (白鳥 百合子) while Kohana is portrayed by Tamaki Matsumoto (松元 環季).

Momotaros

Momotaros (モモタロス) is a hot-headed and arrogant yet comedic Oni/namesake-themed Imagin who is more interested in fighting than helping other Imagin. After initially failing to possess Ryotaro, Momotaros reluctantly joins the DenLiner crew and forms a contract with and fights alongside him. In time, Momotaros becomes the self-proclaimed leader of Ryotaro's additional Imagin partners. The team would eventually become the DenLiner Police (デンライナーポリス) to keep rogue Imagin in check and eventually represent Den-O as a whole in succeeding media in light of Ryotaro's absence. On his own, Momotaros wields the Momotarosword (モモタロスォード). As Kamen Rider Den-O, he assumes the red-colored Sword Form (ソードフォーム) and wields the DenGasher in Sword Mode (ソードモード), which allows him to perform the Extreme Slash (エクストリームスラッシュ) Full Charge. He also possesses primary control over Climax Form and can channel his power through the DenKamen Sword's MomoSword (モモソード) mode. During the events of the film Kamen Rider × Super Sentai: Ultra Super Hero Taisen, Momotaros gains the ability to transform into the pink-colored Momorider (モモライダー), a hybrid of Momorenger and the Double Riders. Momotaros is voiced by Toshihiko Seki (関 俊彦).

Urataros

Urataros (ウラタロス) is a suave, charming yet deceitful sea turtle/Urashima Tarō-themed Imagin who encounters Ryotaro after possessing him to use his status as a Singularity Point to pursue personal freedoms. Despite his personality, the latter allows the Imagin to stay after sensing he has a good heart. On his own, Urataros wields the Uratarod (ウラタロッド) staff. As Kamen Rider Den-O, he assumes the blue-colored Rod Form (ロッドフォーム) and wields the DenGasher in Rod Mode (ロッドモード), which allows him to perform the Solid Attack (ソリッドアタック) and Den-Rider Kick (デンライダーキック) Full Charges. He also controls Climax Form's right arm and can channel his power through the DenKamen Sword's UraRod (ウラロッド) mode. Urataros is voiced by Kōji Yusa (遊佐 浩二).

Kintaros

Kintaros (キンタロス) is a noble bear/namesake-themed Imagin with a sumo wrestler-like personality and fighting style who displays an obsession with making his opponents "cry" (泣けるで). On his own, Kintaros wields the Kintaros Axe (キンタロスアックス). As Kamen Rider Den-O, he assumes the yellow-colored Axe Form (アックスフォーム) and wields the DenGasher in Axe Form (アックスモード), which allows him to perform the Dynamic Chop (ダイナミックチョップ) Full Charge. He also controls Climax Form's left arm and can channel his power through the DenKamen Sword's KinAxe (キンアックス) mode. Kintaros is voiced by Masaki Terasoma (てらそま まさき).

Ryutaros

Ryutaros (リュウタロス) is a childish dragon/Taro the Dragon Boy-themed Imagin and a former member of Kai's gang who displays a love of breakdancing and animals. Having laid dormant in Ryotaro until he is awakened by Issē's counseling, Ryutaros initially seeks to take over the DenLiner and kill Ryotaro as part of a deal with Kai. However, the Imagin develops a crush on Airi, abandons his plans, and joins the DenLiner's crew. On his own, Ryutaros wields the Ryuvolver (リュウボルバー) shotgun. As Kamen Rider Den-O, he assumes the violet-colored Gun Form (ガンフォーム) and wields the DenGasher in Gun Mode (ガンモード), which allows him to perform the Wild Shot (ワイルドショット) Full Charge. He also controls Climax Form's legs and can channel his power through the DenKamen Sword's RyuGun (リュウガン) mode. Ryutaros is voiced by Kenichi Suzumura (鈴村 健一).

Yuto Sakurai

Yuto Sakurai (桜井 侑斗) is a spoiled, immature, and wrathful former high school student who was recruited by his future self to become Kamen Rider Zeronos (仮面ライダーゼロノス) and utilize the ZeroLiner (ゼロライナー) steam locomotive to protect the timeline from rogue Imagin, though memories of him across the timeline are erased every time he uses his Rider powers. Taking his mission seriously, Yuto abuses his Imagin partner Deneb and initially sees Ryotaro as being unfit to be a Kamen Rider because of the latter's desire to protect people and for refusing to use dishonest methods. However, Yuto eventually warms up to him and takes on some of his traits. Utilizing a green-colored Zeronos Card (ゼロノスカード) in conjunction with the Zeronos Belt (ゼロノスベルト), Yuto can transform into Kamen Rider Zeronos Altair Form (アルタイルフォーム). While transformed, he wields the ZeroGasher (ゼロガッシャー), which has a Saber Mode (サーベルモード) for performing the Splendid End (スプレンデッドエンド) Full Charge and a Bowgun Mode (ボウガンモード) for performing the Grand Strike (グランドストライク) Full Charge. With a red-colored Zeronos Card, he can assume Zero Form (ゼロフォーム). During the events of the web-exclusive series Kamen Rider Outsiders, an alternate universe Yuto from a world where he lost his loved ones and was involved in an undisclosed disaster that he failed to overcome accepts Zein's offer to eradicate malice and obtains the Zein Driver (ゼインドライバー) belt and its corresponding Progrise Key from Sakuya Tachibana and George Karizaki, allowing him to transform into Kamen Rider Zein (仮面ライダーゼイン). While transformed, he can use variants of the Rider Cards called Zein Cards (ゼインカード), which are only usable once after being shredded by the Zein Driver, to gain the abilities and weaponry of the corresponding Kamen Rider. His finishers are the Justice Order (ジャスティスオーダー) and Justice Punishment (ジャスティスパニッシュメント). Yuto Sakurai is portrayed by Yuichi Nakamura (中村 優一).

Yu

"Yu" (ユウ) is the nickname of Yuto's 11-year-old self who appears exclusively in the film Cho Kamen Rider Den-O & Decade Neo Generations: The Onigashima Warship. Having lost his mother to an unspecified disease and his father going away for a business trip, Yu is forced to move in with his grandmother in the countryside, where he has trouble making friends. As a result of the Oni clan attempting to alter the present by rewriting the Momotarō folktale, Yu gets caught in the middle of the conflict between them and the DenLiner crew as he possessed the Trump Stone (切り札の石), an artifact passed down by his mother's ancestors that the Oni clan seek for their plot. In order to recover Yuto from the time distortion and help fight the Oni clan, Yu forms a contract with Deneb and eventually finds his courage once he is returned to his original time. Yu is portrayed by Ruka Sawaki (沢木 ルカ).

Deneb

Deneb (デネブ) is a polite and loyal yet over-apologetic crow/Benkei-themed Imagin partnered with Yuto who serves as his butler, parental figure, and combat aide. Despite being abused by Yuto, Deneb stays with him out of loyalty to the former's future self. While possessing Yuto and utilizing a yellow-colored Zeronos Card, Deneb can transform into Kamen Rider Zeronos Vega Form (ベガフォーム). He can also turn into the Denebick Buster (デネビックバスター) firearm for Yuto's use in Zero Form, which allows him to perform the Buster Nova (バスターノヴァ) Full Charge. Deneb is voiced by Hōchū Ōtsuka (大塚 芳忠).

Recurring characters

Airi Nogami

Airi Nogami (野上 愛理) is Ryotaro's older sister and owner of the Milk Dipper (ミルクディッパー) library/café, which previously belonged to their parents, who serves as a motherly figure to him, and the object of several young men's affections, though she remains oblivious to their advances. She was originally meant to marry Yuto prior to the series, having becoming pregnant with Hana, but Sakurai was forced to erase himself and their child from Airi's memories to protect her from Kai. Nonetheless, she retains trace amounts of her time with him, which manifests as a feeling that something is missing. By the series finale, she regains her memories of him. Airi is portrayed by Wakana Matsumoto (松本 若菜).

Seigi Ozaki

Seigi Ozaki (尾崎 正義) is a journalist, chief editor of a short-lived magazine, and a regular at the Milk Dipper who seeks to restore the magazine. While he primarily seeks Airi's affections, he has flirted with other women since childhood. Seigi Ozaki is portrayed by Akira Nagata (永田 彬).

Issē Miura

Issē Miura (三浦 イッセー) is an introverted and self-styled "super counselor" and a regular at the Milk Dipper who also vies for Airi's affections. Issē Miura is portrayed by Ryo Ueno (上野 亮).

Naomi

Naomi (ナオミ) is the hyperactive and perky yet level-headed waitress of the DenLiner's dining car who, despite her best efforts, often makes coffee that tastes terrible to humans, but is irresistible to Imagin. Naomi is portrayed by Rina Akiyama (秋山 莉奈).

Owner

The serious yet eccentric Owner (オーナー) of the time-traveling DenLiner (デンライナー) bullet train is a Singularity Point who is knowledgeable in the timeline's inner workings, speaks in complex riddles when discussing its nature, and displays zero tolerance for those who fight on the DenLiner and violate the flow of time. He is also known for eating dishes, usually rice or flan, adorned with a flag, and attempting to finish the meal without knocking the flag over as part of a rivalry he shares with the Station Master. During the events of the film Kamen Rider Den-O & Kiva: Climax Deka, the Owner establishes the DenLiner Police, names himself its Chief Inspector, and takes up a DenGasher modified to shoot tranquilizer flags. The Owner is portrayed by Kenjirō Ishimaru (石丸 謙二郎), who also portrays the Station Master.

Past Man

The "Past Man" (過去の男) is Yuto's mysterious future self and Hana's father who investigates the Imagin's activities. He was originally set to marry Airi until Kai's plans forced him to erase himself from the timeline to protect her and Hana, go into hiding to stop him, and recruit his younger self to assist further. The Past Man is portrayed by Tomonobu Okano (岡野 友信).

Sieg

Sieg (ジーク) is a princely yet superior-minded and easily agitated swan/Swan Lake-themed Imagin and unofficial member of Ryotaro's group. Six months prior to the latter becoming Kamen Rider Den-O, Sieg intended to form a contract with a pregnant woman named Shiori Takayama, but was trapped within a deep sleep by her baby, Yusuke. After Yusuke is born, Sieg emerges with no memory of what happened and left gradually deteriorating due to the baby not having enough memory to maintain his existence. Sieg possesses Ryotaro to save himself before realizing he successfully formed a contract with Shiori, who wished for Yusuke to be safe. Having fulfilled the contract, he stays behind on the date of her fondest memory, her wedding day, but occasionally returns to aid the DenLiner crew. While possessing Ryotaro and eventually on his own, Sieg can utilize a Rider Pass in conjunction with the Wing Buckle (ウイングバックル) belt to transform into the white-colored Kamen Rider Den-O Wing Form (ウイングフォーム). While transformed, he dual wields the DenGasher in Handaxe Mode (ハンドアックスモード) and Boomerang Mode (ブーメランモード), which allows him to perform the Royal Smash (ロイヤルスマッシュ) Full Charge. Additionally, he can fuse with Ryotaro and the Taros Imagin to transform into the winged Kamen Rider Den-O Super Climax Form (超･クライマックスフォー). Sieg is voiced by Shin-ichiro Miki (三木 眞一郎).

Gaoh

Gaoh (牙王) is a thief-king who became disillusioned with the idea of time and seeks to take over the space-time continuum via the power of the GaohLiner (ガオウライナー), a legendary crocodile-themed time train formerly known as God's Train (神の列車) that was created by an ancient civilization to erase Singularity Points before it was sealed for fear of its power. Throughout episodes 25-28 of the series and the film Kamen Rider Den-O: I'm Born!, Gaoh leads an army of Imagin in establishing a camp in May 2000 and sending Mole Imagin to 2007 to lure the DenLiner crew into a trap so he can steal the DenLiner itself and use the Owner's Master Pass to travel to the Sengoku era. From there, he manipulates Yukimura Sanada into opening the cave where the GaohLiner was sealed before using it to reach 1988 with the intention of killing Ryotaro before he is born, only to be foiled by Kamen Rider Zeronos and four versions of Kamen Rider Den-O from across the timeline and turned to dust while the GaohLiner is destroyed by the DenLiner and ZeroLiner. Utilizing the Master Pass (マスターパス) in conjunction with the Gaoh Belt (ガオウベルト), Gaoh can transform into Kamen Rider Gaoh (仮面ライダーガオウ（牙王）). While transformed, he wields the serrated GaohGasher (ガオウガッシャー) sword, which allows him to perform the Tyrant Crash (タイラントクラッシュ) Full Charge. Gaoh is portrayed by Hiroyuki Watanabe (渡辺 裕之).

Station Master

The Station Master (駅長) is the Owner's effeminate rival who physically resembles him, though they claim it is simply others' imagination. The Station Master is portrayed by Kenjirō Ishimaru, who also portrays the Owner.

Kai

Kai (カイ) is a Singularity Point from the future and the leader of an army of Imagin who possesses psychic powers, such as telepathy and mind control, and the ability to open time portals who seeks to save the Imagin's time by killing a special human called the "Junction Point". In pursuit of his goal, he sends Imagin to wreak havoc across the timeline in search of them. Initially believing it is Yuto's future self, Kai attempts to kill him before shifting his attention to Kamen Rider Den-O. He eventually discovers Hana is his target, but is ultimately killed by Kamen Rider Den-O and his allies, causing him to dissolve into sand and take several Imagin with him. Kai is portrayed by Hideo Ishiguro (石黒 英雄).

Guest characters

Spin-off exclusive characters

Negataros

Negataros (ネガタロス) is an Oni/"Issun-bōshi"-themed Imagin, founder of the Negataros Corps, and evil counterpart of Momotaros who seeks to restore the Imagins' timeline and appears exclusively in the film Kamen Rider Den-O & Kiva: Climax Deka. Having survived Kai's death and obtained the means to become Kamen Rider Nega Den-O (仮面ライダーネガ電王), he leads other surviving Imagin in forming an alliance with a group of Fangires and mobsters, but is foiled by double agent Yuto and killed by Kamen Riders Den-O and Kiva. Utilizing a Rider Pass in conjunction with his own Den-O Belt, Negataros can transform into Kamen Rider Nega Den-O Nega Form (ネガフォーム). While transformed, he wields the Nega DenGasher (ネガデンガッシャー) and commands the Nega DenLiner (ネガデンライナー). Negataros is voiced by Hikaru Midorikawa (緑川 光).

Kotaro Nogami

Kotaro Nogami (野上 幸太郎) is Ryotaro's arrogant future grandson partnered with an Imagin named Teddy who can transform into Kamen Rider New Den-O (仮面ライダーNEW電王), utilizes the New DenLiner (NEWデンライナー), and first appears in the film Saraba Kamen Rider Den-O: Final Countdown. Utilizing a Rider Pass in conjunction with the New Den-O Belt (NEWデンオウベルト), Kotaro can transform into Kamen Rider New Den-O Strike Form (ストライクフォーム). While transformed, he gains the ability to wield Teddy as the Macheteddy, Kintaros as the Kintaono (キンタオノ) battle axe, Urataros as the Uratazao (ウラタザオ) fishing rod, and Momotaros as the Momotaken (モモタケン) flame-bladed sword. He also wields the DenGasher. His Full Charge is the Strike Spurt (ストライクスパート). During the events of the film Cho Kamen Rider Den-O & Decade Neo Generations: The Onigashima Warship, Kotaro gains access to his own version of Vega Form while possessed by Deneb. In this form, he wields the DenGasher in Naginata Mode (ナギナタモード), which allows him to perform the Brandish Dive (ブランディッシュダイブ) Full Charge. Kotaro Nogami is portrayed by Dori Sakurada (桜田 通).

Teddy

Neotaros (ネオタロス), also known as Teddy (テディ), is an Oni/Momotaros-themed Imagin and Kotaro's partner who can transform into the Macheteddy (マチェーテディ) sword/rifle hybrid for his use in combat, which allows him to perform the Counter Slash (カウンタースラッシュ) Full Charge, and first appears in the film Saraba Kamen Rider Den-O: Final Countdown. Unlike other Imagin, Teddy is based on Kotaro's memories of Ryotaro and Momotaros' exploits instead of a literary folktale. Teddy is voiced by Daisuke Ono (小野 大輔).

Shiro

Shiro (死郎) is a necromancer capable of reviving Imagin and humans who can become Kamen Rider Yuuki (仮面ライダー幽汽) and appears exclusively in the film Saraba Kamen Rider Den-O: Final Countdown. He seeks to revive his lover Sora by switching the inhabitants of the living world and the afterlife via the power of his Ghost Train (幽霊列車), which is capable of traveling to the latter world. In pursuit of his goals, he kidnaps Ryotaro to utilize his Singularity Point status to travel through time. However, he is foiled by Kamen Riders Den-O Sword and Liner Form and New Den-O. Utilizing a Rider Pass in conjunction with the Yuuki Belt (ユウキベルト), Shiro can transform into Kamen Rider Yuuki Hijack Form (ハイジャックフォーム). While transformed, he wields the SavageGasher (サヴェジガッシャー) sword, which allows him to perform his own version of the Terminate Flash, along with a whip and exploding tops. Shiro is portrayed by Yu-ki Matsumura (松村 雄基).

Kamen Rider G Den-O

Kamen Rider G Den-O (仮面ライダーG電王) is a police officer/police car-themed moniker shared by Reiji Kurosaki and his Imagin partner, Eve, acting as the antagonists of the Cho Den-O trilogy's Episode Yellow. They transform utilizing a Rider Pass in conjunction with the G Den-O Belt (Gデンオウベルト) and wield their own DenGasher, which can switch between Jitte Mode (十手モード) and Gun Mode; the latter of which allows them to perform the World Punish (ワールドパニッシュ) Full Charge.

Reiji Kurosaki

Reiji Kurosaki (黒崎 レイジ) is an officer of the Time Police (時間警察) who has an uneasy relationship with his mother Sayuri Mizushima (水島 さゆり). After being abandoned by his mother and Daiki Kaito steals a Kurosaki family heirloom, the combination of these tragedies led him to distrust humans and rely solely on Eve as both his moral support and mission partner. He arrests Kaito and the DenLiner crew for disrupting the timeline in 2008, but Kaito recovers Sayuri's letter to prove her love for her son. Reiji's hesitance leads to Eve going rogue and hijacking G Den-O. Nonetheless, Reiji reconciles with Kaito, providing him with a K-Touch to defeat Eve before visiting his mother's flower shop. Reiji Kurosaki is portrayed by Yuta Furukawa (古川 雄大) and Waku Sakaguchi (坂口 湧久) as a child.

Eve

Eve (イブ) is an artificial Imagin who was created by the Time Police to serve as Reiji's aide. Lacking a corporeal form, Eve resides in the Rider Pass and G Den-O's dobermann-like breastplate to supply Reiji with his abilities of time travel, near-future prediction and compensating for his blind spots in combat. When Reiji starts to show emotions, Eve hijacks the G Den-O form for his own and contemplates ruling the timeline through an army of artificial Imagin before he is defeated by Kamen Rider Diend Complete Form. Eve is voiced by Hiroki Takahashi (高橋 広樹).

Kensuke Aoto

Kensuke Aoto (青舐 健介) is a wealthy gambler who appears exclusively in the non-canonical novel Kamen Rider Den-O: The Demon Dog of Tokyo World Tower. Due to his ability to "read the future" and gambling away his wealth during a financial crisis in 2008, he becomes apathetic to everyone around him. In 2013, he attempts to demolish the Milk Dipper and the surrounding area to make way for the Tokyo World Tower skyscraper to rival the Tokyo Skytree. However, the Turkey Imagin travels back in time to prevent Kensuke from losing his money.

Kajiwara Kagetoki

Kajiwara Kagetoki (梶原 景時) is a fictionalized version of the historical figure of the same name and a Time Jacker who appears exclusively in the novel Kamen Rider Den-O: Deneb Kanjinchou. He travels to the Heian period of Japan.