Mephisto Pheles

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Mephisto Pheles (メフィスト・フェレス, Mefisuto Feresu?)
Voiced by: Hiroshi Kamiya
Mephisto is the Chairman of True Cross Academy's Japanese branch. He is portrayed as a man with more money than sense but is very cheap when it comes to spending on others. After Fujimoto's death, he was ordered to kill Rin but instead accepted Rin's proposal of becoming an Exorcist and enrolled him into True Cross Academy. Mephisto is a powerful exorcist (holds a Meister in Honorary Knight, was able to subdue Amaimon while holding a berserk Rin off) and claims that he desires to "bring peace to both Assiah and Gehenna". Despite having served the True Cross for at least two centuries, elements of the Order still consider him suspicious.
It has been heavily implied that Mephisto is the son of Satan along with his brother, the Earth King, Amaimon. He possesses the unique and peculiar ability of transforming into a small dog. He goes by the name Johann Faust the Fifth in public, a further pun on the play Faust.