Having several users, Kamen Rider Dark Kiva had two suit actors. The main suit actor for Dark Kiva (King) was Seiji Takaiwa (高岩 成二 Takaiwa Seiji), who was also suit actor for Kamen Rider Kiva, Garulu, and Kamen Rider New Kiva. When used by Otoya Kurenai and Taiga Nobori, Dark Kiva's suit actor is Eitoku (永徳 Eitoku), who was also suit actor for Kamen Rider Saga and Dogga.