Mephisto Pheles (メフィスト・フェレス Mefisuto Feresu), whose real name is Samael (サマエル Samaeru), is an Exorcist and the second strongest of the Eight Demon Kings; he holds the title The King of Time (時の王 Toki no Ō).[1] He uses the name Johann Faust V (ヨハン·ファウスト五世 Yohan Fausuto Gosei) in public and is the Principal of True Cross Academy.[2] Following the death of Shiro Fujimoto, Mephisto takes it upon himself to enroll Rin in True Cross Academy.