Rook (ルーク, Rūku), otherwise known as the Lion Fangire (ライオンファンガイア, Raion Fangaia) was a member of the Checkmate Four (1986), being in charge of guarding the King[1]. His true name as a Fangire is Creation of Heaven and Earth, listening to the Baby's Cry and the Angry Roar (天地開闢, 産声と怒号を聞きながら, Tenchikaibyaku, ubugoe to Dogō o Kiki Nagara).