Riki (Kiva)

Riki (力（リキ）?) is the human form of the silent Dogga (ドッガ, Dogga?), the last surviving member of the Frankenstein's monster-like Franken Race (フランケン族, Furanken Zoku?). He has unbeatable strength 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 tends to eat things that are inedible to normal people. In 1986, he lives 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 became a kakigoori seller until Jiro asked for their aid. After becoming unable to kill Otoya to save himself (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 Dogga Hammer (ドッガハンマー, Dogga Hanmā?). 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, Dogga Fōmu?).

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, chikara?).

Riki is portrayed by Eiji Takigawa (滝川 英治, Takigawa Eiji?).