Rei Ijuin

He is the grandson of the Chairman of the Board at Kirameki High School and the scion of the Ijuuin conglomerate, one of the world's wealthiest families. His family possesses unfathomable wealth. Initially, he appears as a classmate who makes snide remarks to the protagonist while remaining popular among the female students; however, he harbors a hidden secret... He even commands a private army. Incidentally, when he joins the fray, he appears clad in knight-like armor. He belongs to a mysterious club known as the "Private Club," though the true nature of its activities remains shrouded in mystery.