Mephisto Pheles

Mephisto Pheles serves as the Chairman of True Cross Academy and holds the rank of an honorary knight and high-ranking Exorcist. While he was officially tasked with executing Rin Okumura after Fujimoto’s death, he chose to mentor the boy as a student instead. He is strongly hinted to be the son of Satan, sharing this lineage with his brother Amaimon. Though he can transform into a small dog and often maintains a whimsical demeanor, his controversial decisions have frequently allowed dangerous demons onto the academy campus.