Jakuu is a werewolf specimen that is held in a facility that houses other mythical creatures to be studied. He was brought in by the head of the department, Sinai, who found Jakuu nearly dead. Now he is trying to breed with his caretaker.

Takashi“Shiro”Shirogane，被加拉竞技场的其他囚犯称为“冠军”，一位享有传奇声誉的熟练飞行员，也是战神战神五圣骑士的领袖。他是战神金刚黑狮的圣骑士。