Onizuka Sakie

The warden of the men's prison cell where the protagonist is held.

She is a very strong-willed woman, but she is awakened to masochistic pleasure by the protagonist. She is not a fussy woman, but she is a woman with a brutal atmospher and is feared by the guards.

She and the protagonist are usually equals, but during sexual intercourse, they take on a master slave relationship.

Her attitude toward women is the same as the protagonist's, and she only thinks about torturing them. She likes to be raped herself, but she also likes to torture women and watch them be tortured.