Riko Onizuka 鬼塚理子

Riko Onizuka was a member of the team Teru's brother led as well as his previous girlfriend; she has a good friendship with Tasuku Kurosaki and often subtly serves as his adviser on his situation with Teru. She is the current housemate of Teru as well as Kurosaki's neighbor. She is also the current school councilor at Teru's high school.