Isawa Shokan lived around the eight century IC. He won the Topaz Championship, and in turn became an Emerald Magistrate. While on duty his soul was twisted by a maho curse and became a Maho-tsukai, Shokansuru. After bargaining with an Oni Lord he became half-oni. Shokansuru excelled at binding demons to the souls of mortals, and dreamed with a world where the Oni rule over humans, sacrificing himself to allow the return of The Maw.