Riki (Kiva)

Riki (力（リキ）) is the human form of the silent Dogga (ドッガ), the last surviving member of the Frankenstein's monster-like Franken Race (フランケン族) of the 13 Demon Races.

Fictional character biography
In 1986, Riki lived in human society as a masseur in Ramon's parlor before moving into the Café mald'amour to work there for a bit, falling in love with Yuri after eating her food. When Jiro left, Riki joined Ramon to become a kakigoori seller until Jiro asked for their aid at defeating the Rook. All three Arm Monsters, Otoya and Yuri eventually managed to defeat him. After some time passes, Ramon and the rest of the Arm Monsters would soon face the Fangire King whom they managed to get away once, then unsuccessfully trying to kidnap Maya to act as a sheild from him. As they were faced by the Fangire King once more only to lose again, they were given a choice between dying or killing Otoya themselves. After finding themselves unwilling to kill Otoya to save themselves (as per the King's offer), Riki decides to flee. After seeing Ramon sealed by the King, Riki attempts to run away, but is sealed into the Demon Iron Hammer Dogga Hammer (魔鉄槌ドッガハンマー). They were eventually freed by Otoya during the midst of the battle against the Fangire King. All three soon run away during the confusion. After the Fangire King was defeated, the Arm Monsters decided to go inside Castle Doran, though not before promising Otoya to help his unborn son in his place. This leads to Riki now aiding Wataru in 2008, his Dogga Hammer used by Kiva to assume Dogga Form (ドッガフォーム).

Personality
A rather slow and dim guy, Riki initially acted like an average Fangire, secretly feeding off human life energy while getting mad at any human that doesn`t act the way he wants them to. After meeting Otoya, Riki somewhat changed for the better as he seemingly stopped killing humans. He even went as far as to not kill Otoya when the Fangire King made Riki choose between dying or killing Otoya himself. In 2008, Riki became more obedient and pessimistic while helping Wataru.

Powers
Riki has superior strength compared to the other Arm Monsters and feeds by grabbing a person and draining the soul out in the form of electrical discharges. He acts as Castle Doran's butler, assuming his true form by pounding his fists together. He can only speak in a slow, monotone voice, and is thus not as talkative as Jiro or Ramon, usually having one of them speak for him. In addition to his habit of popping his neck, Riki can eat things that are inedible to normal people. In his Dogga Form, Riki is durable enough to withstand being attacked by members of the Checkmate Four despite being weaker than them. He also defeated multiple revived Fangires in 2008 hinting that Riki became stronger as time passed. He along with the other Arm Monsters can also lend their powers to Kiva and presumably New Kiva through Fuestles. This is to the point where they can combine their powers at once to assume DoGaBaKi Form and DoGaBaKi Emperor Form.

Novel
In the novel reimagination of the TV series, Dogga, along with Kivat and Bassha, does not exist in the story, as Kiva is Wataru's Fangire form here.

Fuestles
There are three Fuestles (フエッスル) in the possession of Kamen Riders Kiva, Ixa and Dark Kiva respectively, which allow access to Dogga's power.
 * Dogga Fuestle (ドッガフエッスル): Kiva uses this Fuestle to summon Dogga from Castle Doran.
 * Dogga Fake Fuestle (ドッガフェイクフエッスル): A Fuestle that copies the frequency of Kiva's Dogga Fuestle, allowing Ixa to hijack the Dogga Hammer when summoned. This Fuestle was not used in the series' run.
 * Dogga-Seal Fuestle (ドッガシールフエッスル): This Fuestle seals Dogga by emitting a continuous sound, creating an energy sphere that captures Dogga and converts him into the Dogga Hammer.

Rider Card
The power Dogga lends Kiva is harnessed in the Kiva Dogga (キバドッガ) Form Ride Card (フォームライドカード), which is used by Decade to transform into Kamen Rider Kiva Dogga Form. Used once in the World of Ryuki to fight Kamen Rider Knight.

Portrayal
Riki is portrayed by Eiji Takigawa (滝川 英治). As Dogga, his suit actor was Eitoku (永徳).

Etymology
The word "dogga" (ドッガ) is a Japanese onomatopoeic sound representation of a great thud; in the case, a hammer hitting, while "Riki"'s name is spelled with the same kanji for "power" (力).