Kurai is a teenager who was originally put into a child's mind, Cai Digaima was the child's name, as somehow, Kurai became into reality. He acts usually neutral to everyone, and is not too much of a threat, he has multiple abilities that he uses in combat, and good social skills, and is otherwise known as Makoto Yuki, as thats the name he gave himself, with Kurai being a nickname.