Master Therion

Leader of the Black Lodge society for the dark arts. With ravishing good looks and a powerful, charismatic personality, he is the true image of a charming demon. To light a fire in those languid, listless eyes, causing acts of evil and cruelty are his only delight.

His organization is one of the few openly claiming a connection to ancient, forbidden magic, and the power he wields is indeed fearsome - a power that has led to ennui and nihilism so extreme that he would rather toy with an amusing opponent than crush him utterly.

Spoiler

In Kishin Hishou Demonbane, Master Therion and other former enemies from Zanma Taisei/Kishin Houkou were brought back by Another Blood as nightmare for her "story". The true Master Therion has been erased from history after the events of Al Azif's route.