Kenja Sion

One of the sages. The mastermind who summoned Yagiri's class to another world. A magician with immense magical power, according to Hanakawa, who has appraisal skills, his level exceeded 100 million and continued to level up by the second. After giving the summoned sage candidates a minimal explanation, he ordered them to undergo severe trials and then left the bus. Yagiri was asleep during the explanation, so he was spared from being targeted by the instant death ability. He always keeps a smile, but his personality is cruel and imperious, not hesitating to kill those he dislikes or considers a threat.

He attempted to dispose of the mysterious Yagiri, but a researcher he summoned for clues (a different person from Shiraishi mentioned later) reported that Yagiri had disappeared from his own world right before dying as the confidentiality mechanism activated. Thinking he might be a hero-like figure, the dispatched Sage Aoi became terrified of Yagiri's true nature and withdrew into seclusion. He also questioned his classmate Hanakawa but could not get a clear answer. He tried to take matters into his own hands, but only after his subordinate Youichi and his own body were "partially killed" (beyond his own healing capabilities), did he finally understand the danger Yagiri posed, only to be consumed and obliterated by the overflowing demon lord Mana from the demon world.