Characters / Kamen Rider Kiva

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Wataru Kurenai/Kamen Rider Kiva

Live actor: Koji Seto
Suit actor: Seiji Takaiwa

A shy violinist who fights Fangires as Kamen Rider Kiva.

  • The Dreaded: Nago, Shima and Megumi speak of Kiva as a terrifying, mysterious spectre who preys on humanity, when he is in fact a meek shut-in whose hobbies include taking baths and collecting bizarre smelly items for the purpose of making violins. It helps that Wataru basically never speaks as Kiva, leading to his reputation as a silent killer as opposed to The Quiet One.
  • Extreme Doormat: Wataru's often subscribed to magazines he doesn't want and buys things that he doesn't need because he doesn't like refusing others. Of course, Character Development has helped him for the better.
  • Finishing Move:
    • Kiva Form: (Rider Kick) Darkness Moon Break
    • Garulu Form: (Rider Slash) Garulu Howling Slash
    • Basshaa Form: (Rider Shooting) Basshaa Aqua Tornado
    • Dogga Form: (Rider Thrust) Dogga Thunder Slap
    • DoGaBaKi Form: (Rider Kick) A stronger version of the Darkness Moon Break.
    • Emperor Form:
      • (Rider Kick) Emperor Moon Break
      • (Rider Slash) Emperor Howling Slash
      • (Rider Shooting) Emperor Aqua Tornado (While never shown in series, it was shown in Kamen Rider: Battride War)
      • (Rider Thrust) Emperor Thunder Slap
      • (Rider Slash) Final Zanvat Slash
    • Flight Style: Bloody Strike
    • DoGaBaKi Emperor Form: (Rider Kick) DoGaBaKi Emperor Break
  • Furo Scene: Wataru has a scene in a bath basically Once an Episode.
  • Glass Cannon: Garulu Form.
  • Half-Human Hybrid: Dhampyr-like; Wataru himself didn't know until #36. Though it should be noted that unlike most Dhampyrs in fiction, his mother is the vampire parent.
  • Hikikomori: Bat pun aside, this is Wataru at the beginning of the series. He improves, then regresses after the death of a loved one, only to come back stronger.
  • Her Heart Will Go On: Mio encourages Wataru to live on after her death, and, as indicated by the epilogue, in the future, Wataru has a son with an unknown woman.
  • Hour of Power: Dogabaki Form.
  • Hunter of His Own Kind: A half-Fangire, half-human who fights full-blooded Fangires.
  • Hybrid Power: His Fangire side allows him to become Kiva and his human side prevents him from feeling the urge to drain human life energy. However, the fact that he is only half-Fangire also prevents him from being able to utilize the full power of Kiva. This is illustrated by the chains binding his Rider form. Furthermore, his human blood keeps his Fangire side in line; if let loose, Wataru becomes more or less an animal as shown in #39 and #40.
  • Jack-of-All-Stats: Kiva Form.
  • Making a Splash: Basshaa Form.
  • Mid-Season Upgrade: DoGaBaKi Form.
  • Mighty Glacier: Dogga Form.
  • One-Winged Angel: His Flight Style, which is basically him turning into a freaking dragon.
  • Playing with Fire: Garulu Form.
  • Power Limiter: Emperor Form is actually Kiva's true form, his default form is actually a limiter because his Half-Human Hybrid nature meant his true power would've overwhelmed him originally, thus the chains on it that break off during transformation.
  • Shock and Awe: Dogga Form.
  • Shrinking Violet: He eventually grows out of it.
  • Squishy Wizard: Basshaa Form.
  • Super Mode: Emperor Form.
  • The Southpaw: In Garulu Form.
  • Talking with Signs: Wataru initially communicates with a notebook full of pre-written responses. At one point Megumi asks something like "You can't have a response for everything in there!" When Wataru starts actually looking for a response, she takes it away from him.
  • Took a Level in Badass: Besides the standard Next Tier Power-Up, he goes from a shut-in who thinks he's "allergic to the world" to a professional monster killer, and then takes it one step further by declaring himself the new Fangire King near the end.
  • Weapon of Choice: Garulu Saber in Garulu Form, Basshaa Magnum in Basshaa Form, and Dogga Hammer in Dogga Form. Later obtains the Zanvat Sword for use with Emperor Form.
  • Vampire Hunter: Basically what Kiva does as a Kamen Rider.

Kivat-bat the 3rd

Voice actor: Tomokazu Sugita

Wataru's partner, of the Kivat race.

  • Deadpan Snarker: Kivat is one snarky fellow.
  • Magic Music: Uses "fuestles" to summon Wataru's form-change weapons.
  • Transformation Trinket: His race is built for it, after all.
  • Vague Age: It's never stated how old he is - since it's never revealed if he was born before or after Watarunote , he could just as easily be Wataru's Older Sidekick, the same age as Wataru, or younger.

Megumi Aso

Live actor: Nana Yanagisawa

Shizuka Nomura

Live actor: Rina Koike

  • The Atoner: When Shizuka feels bad about causing a rift between Wataru and Mio, she tries her best to get them to make up.
  • Clingy Jealous Girl: Shizuka turns into a Green-Eyed Monster around Wataru and Mio.
  • Hidden Depths: She might not look like it, but she's good at drumming.
  • Locked Out of the Loop: Only learns that Wataru is Kiva in the final episode, though she does know about Kivat, and even Tatsulot after he joins up.

Keisuke Nago

Live actor: Keisuke Kato

The main user of the IXA system in 2008.

  • Berserk Button: Anything involving the denial of the buttons, and he doesn't really like music.
  • Catch-Phrase: "Fangire, return that life to God!"
  • Expy: Arguably a less hateful (and infinitely less jealous) version of Masato Kusaka.
  • Good Is Not Nice: He's one of the good guys, but has a very rude personality early on.
    • Nago being at his worst is how he killed his own father. He was a police chief who committed procedural errors that got a criminal acquitted, errors that Nago himself exposed to the media with no pity, no less, and drove him to commit suicide out of shame.
  • Heroic B.S.O.D.: When Kiva beats him the first time. It takes a Fangire regarding him as Not Worth Killing to send him over the edge.
  • Jerkass: Oh boy, is he ever! It takes Nago finding out Wataru is Kiva to become more of a Jerk with a Heart of Gold.
  • Jerk with a Heart of Gold: After finding out that Kiva and Wataru are the same person, Nago comes off as more reasonable than he initially was, assuming that Wataru doesn't misuse his power.

Kengo Eritate

Live actor: Kouhei Kumai

  • Career-Ending Injury: When Kengo temporarily joins the Blue Sky Organization, a Fangire injures his arm severely to the point where he can no longer play the guitar and has to end his dreams of being a rock star.

Mio Suzuki/Pearlshell Fangire II

Live actor: Yuria Haga

  • Apologises a Lot: A given, considering her clumsy and shy nature.
  • Betty and Veronica: The Archie for Wataru's Betty and Taiga's Veronica.
  • Beware the Nice Ones: Despite being just as shy and awkward as Wataru, Mio is still someone you don't want to mess with, especially since she's the Queen of Checkmate Four. A prime example is her obliteration of the Spider Fangire.
  • Cute Clumsy Girl: While working as a waitress, she managed to trip over herself, spilling food all over the customers.
  • Extreme Doormat: Tends to have trouble asserting herself. Something she has in common with Wataru.


Voice actor: Akira Ishida

Taiga Nobori/Kamen Rider Saga/ Kamen Rider Dark Kiva III

Live actor: Shouma Yamamoto
Suit actor: Eitoku

  • Barrier Warrior: Pulls this on the '86 King as an infant.
  • Betty and Veronica: The Veronica to Wataru's Betty for Mio's Archie.
  • Black Speech: His partner, Sagarc, is only able to speak a long forgotten Fangire language, with the exception of the words "Henshin" and "Wake Up".
  • The Evil Prince: At first, it seems like this trope is played straight - he's the son of the previous Fangire King and the first Fangire Queen, he's in line for the throne, and he's set up as a villain. However, the "evil" part is first downplayed (he's more of an anti-villain than an outright Big Bad), and eventually it's outright subverted, since he decides to work towards co-existence between humans and Fangires near the end of the series.
  • Finishing Move: Snaking Death Break.
  • Long-Lost Relative: To Wataru - they were friends as children but had no idea they were brothers.
  • Patricide: Teams up with Wataru to kill his father, King/The Bat Fangire. Unlike most examples, there is no My God, What Have I Done?, mainly because King is a total bastard.
  • Royal Rapier: Jacorder.
  • Self-Made Orphan: At first, it seems like he's played this trope straight, seemingly having killed both his mother and his father. Subverted when it turns out that he didn't kill his mother.
  • The Ghost: Not him, but rather, his Fangire form - it's clearly established that he is one, but he never transforms into one. However, throughout the show, it's heavily implied that he's the Snake fangire. Whether he prefers using the powers of Saga (and later, Dark Kiva)
  • Transformation Trinket: Sagarc.


Otoya Kurenai

Live actor: Kouhei Takeda

Wataru's father, a master violinist (and a thief) who disappeared under mysterious circumstances. He is the main Kamen Rider IXA in 1986. Eventually becomes the only human to become Dark Kiva, a feat he pulls off thrice before the resulting strain eventually killed him.

  • Back from the Dead: In Episodes 19 and 20, though he does it by taking over Wataru's body.
  • Betty and Veronica: Originally the Betty to Jiro's Veronica for Yuri's Archie, then becomes the Archie for Yuri's Betty and Maya's Veronica.
  • Beware the Silly Ones: He's constantly seen as a lecherous person, with him being IXA seemingly the most serious he's willing to get. He also ends up becoming the second person to become Dark Kiva, and the only human in the show to do so.
  • Bunny-Ears Lawyer: Say what you will about how he spends his time, but Otoya's mastery over the violin cannot be denied.
  • Chivalrous Pervert: A good amount of time he spends is attempting to impress women. However, as Jiro learned, if you threaten one he has affections for, you'd better hope that he doesn't have the IXA system nearby.
  • Determinator: While transforming into Dark Kiva kills humans, Otoya manages to transform thrice and survive, if only barely.
  • Deuteragonist: A rare case in Heisei Kamen Rider, where the deuteragonist is not the main secondary Rider.
  • Expy: To Gai Yuki (Black Condor) from Choujin Sentai Jetman. Both of them are womanizers in their own right. Difference is, Otoya's no loner.
  • Foil: An indirect one to his son Wataru. Otoya's a confident, suave violinist who's very good at stealing; while Wataru's an extreme Shrinking Violet who struggles with even basic social standards.
  • Friend to All Living Things: The puppy at Mal d'Amour takes a liking to him immediately, just like he would to Wataru 22 years later. Even flowers react well to Otoya's music...while Yuri just kills a whole pool of fish with hers.
  • Impossible Thief: One of his more underrated and overlooked skills. Not just stealing things, but even planting and replacing things.
  • Interspecies Romance: With Fangire Queen Maya.
  • Posthumous Character: It's hinted at early on, but for the majority of the show, it's never revealed if it's this or if he was just a Disappeared Dad for Wataru. It's later revealed that he's dead by 2008 late in the series. Becoming Dark Kiva—a total of three times—saw to that.

Yuri Aso

Live actor: Yu Takahashi

Megumi's mother.

Kivat-bat the 2nd

Voice actor: Tomokazu Sugita

Kivat's father,


Mamoru Shima

Akira Kido

     Arms Monsters 

Survivors of the great Fangire massacre, a Wolfen, a Franken and a Merman must put aside whatever differences they had and band together for survival.


The last surviving member of the Wolfen Race. Chronologically also the first user of the IXA system.


The last surviving member of the Merman Race.

  • Character Tic: When he transforms, he spins around and does a cheerful pose.
  • Enfante Terrible: He is the most vicious of the Arms Monsters, despite looking like a young boy.
  • Sailor Fuku: Wears the male version.
  • Verbal Tic: Repeating words twice, particularly "Hey, hey."note .


The last surviving member of the Franken Race.

     Checkmate Four 
The most powerful members of the Fangire Race.

King/Bat Fangire

The lord of Fangires.

  • Big Bad: Of the 1986 portion of the show.
  • Final Boss: Twice - first Otoya and Wataru team up to defeat him in the past, then Taiga and Wataru team up to take him down in the present.
  • Karmic Death: When his attempt to kill Maya was turned against him thanks to infant Taiga.

Maya/Queen/Pearlshell Fangire I

  • Daddy Had a Good Reason for Abandoning You: It's not like her mother wanted to leave Wataru, but her status as a fugitive due to defecting from the King would make it difficult to raise Wataru, and thus left him so he'd be free of the danger.
  • The Smurfette Principle: Of the Checkmate Four, she's the only female member. Unless you count her successor as a member at the same time.

Rook/Lion Fangire

  • Psychopathic Manchild: Routinely makes up "games" for himself, basically boiling down to "kill a set amount of people sharing a common trait within 12 hours", with absolutely no other concerns than said game. Note also that he is pretty childish while he has amnesia.

Bishop/Swallowtail Fangire

  • Nice Job Fixing It, Villain!: If he had just kept his mouth shut, or better yet, encouraged Taiga to kill Wataru, as opposed to doing what he actually did - reveal he was the one who killed Mio - he wouldn't have had Taiga turn on him.

     Kamen Rider Ixa 

1986 users: Jiro, Otoya, Yuri (#31)

2008 users: Nago, Kengo, Megumi (#31)

     Kamen Rider Dark Kiva 

1986 users: King, Otoya

2008 users: Taiga

    Movie Exclusive Characters 


A race of monsters sealed up by a Kiva from long ago before being released in modern times.

Takashi Sugimura/Kamen Rider Arc

A prison convict who awakened Arc's spirit.

Arc Kivat

Takato Shiramine/ Kamen Rider Rey

An agent working for the World Wide Wing Association.

Rey Kivat