Tomoko Ryuujin

Оригінальне ім’я: 竜神智子

She is the older sister of Shougo and the daughter of Kengo Ryuujin. She also has a part time job at a diner. In addition to that, she is also a 3rd degree black belt in Karate which would make her a Sensei. (Source: Majin Bone Wikia)