やまめ

A girl who comes to J's castle looking for Ayu. She is Ayu's older sister because Ayu came to live with her family. She's very protective of Ayu and considers her to be her real younger sister.

She frequently attacks J with her signature Yamame Chop, a vicious attack that can stun J. Sometimes, she even aims for his eyes. She also convinces Ayu to help her molest J whenever the opportunity arises.