The male lead of the novel, described as a textbook black-bellied madman. To the public he appears as a cold, top-tier genius; in private he is a paranoid control freak. He is 187 cm tall and is a germaphobe with strong personal boundaries around girls (except for the female lead). He is wearing a long black overcoat, off-white sweater, and dark grey cashmere scarf. He is referred to as Brother Xi by his peers. He is a legendary genius in their department and is described as a favored son of heaven accustomed to being in control.
