Heiwajima Kasuka is the younger brother of Heiwajima Shizuo. He is a famous actor, and his fans know him by his alias, "Hanejima Yuuhei." Kasuka always wears a blank expression with half closed eyes, giving away little emotion. His reserved nature, according to him, is a result of growing up alongside Shizuo, who is known to be a man of little restraint.