Rei Ijuuin

Rei Ijuuin is the grandson of Kirameki High School's board chairman and a scion of the Ijuuin conglomerate, one of the world's wealthiest families. Popular among female students, Rei initially makes snide remarks to the protagonist while harboring an unspecified secret. Rei commands a private army, wears knight-like armor when joining the fray, and belongs to the mysterious Private Club.