Kyouya Oiranzaka is an Oni that works in the Kyoto branch of Oni Corp as a commander of the support squad. His role is to aid Onis who got injured when they fought against the Momotarou Clan.

He is a young man with brown reddish hair, which is styled slightly to the side. He has slender red eyes and appears to have a love for accessories since he loves to wear bracelets and rings and to some extent has piercings on his ears. He seems to be an above average heighted man.

He is a kind, energetic and sweet man who cares about his patients and always keeps his cool. He knows which position he holds and how important the supporting squad is and openly tells Shiki and the other students that that is his battlefield. He also seems to care a lot about his looks and how he appears to other onis. He is also known to be a playboy, flirting with Homare Byoubugaura.