Reiji

This lovable and friendly guy is in charge of the protagonist's training. However, his friendly demeanor hides his true genius as a malicious manipulator of people's thoughts. He's quite the sadist and knew from the start the protagonist wanted some punishing. While he's warm and friendly when around others, he morphs into a dominating alpha when alone and will demand you follow his every order. Still with that warm smile on his face, though.

He's the number 1 salesman in the company and second only to the CEO himself. He was betrayed by Issei in the past and was wrongly accused of his sins. He can no longer trust people because of that and while he may smile at everyone he sees, he will not let anybody into his own heart.