Rui is a strong sorcerer, always quick to cook up a potion. He's young, as he is eighteen years old. Yet Rui is a smart, eccentric and strategic boy. The king of the dark kingdom trusts Rui with his life. Yet Rui gets called a weirdo sometimes, because of his interests of being a sorcerer. Rui has purple hair and yellow eyes, and wears a sorcerer's cloak. Rui absolutely despises Tsukasa, the general of the light knights. He did something to him that Rui could never forgive.