Sougetsu Ootori

The principal of Anti-Magic Academy as well as the Chairman and founder of the Inquisition. While being a suspicious yet allied figure in the beginning of the series, he is ultimately revealed to be the primary antagonist as the events of the story unfolds.

Sougetsu puts on the facade of an outgoing and carefree individual who leads the Inquisition with certain fervor and diligence. He appears to be considerate of his subordinates and work but everyone seems to trust in his position and authority over trusting in his dealings as a person. He speaks about "saving the world".

However, his truest intentions are the exact opposite. Sougetsu is a manipulator not trusted by anyone. His motives to destroy the world is obscured by his position, where his acts to further his goals are publicly seen as acts of policing and justice in the name of the Inquisition and keeping humanity safe. He is particularly uncaring of his subordinates and students and is perfectly content to send them to their deaths if it meant accomplishing something he wanted.

(Source: Taimadou Gakuen 35 Wiki, edited)