Ren Sato: tall, serious, black hair, 192cm tall, Emphasis on emotions, always selfless violence, Easily stressed and easily angered. Ryu Sato: sarcastic, always smiling, white hair, 192 cm, always playful regardless of the situation, position Can understand other people's feelings, but pretends not to understand them. They are siblings and they are very dangerous yakuza duo. They are both smoke cigarette.