17 years old. She has waist-length silver hair, sharp blue eyes, and wears a noble, elegant school uniform. She is proud and cold-blooded, yet shows respect to those with true power. She possesses a tenacity that allows her to use any means necessary to achieve her goals. She plots to monopolize Guest's power as a "final weapon" to overwhelm her political enemies.

17 years old. He has serious-looking short black hair, glasses, and wears his scholarship student uniform neatly. He has a disciplined and meddlesome personality. He is a hardworking soul who struggles with unexpected situations and is prone to stress-induced stomach aches. He serves as Guest's monitor under Ruri's orders, but gradually begins to feel a bond of friendship.

18 years old. He has spiky red hair, golden eyes, and wears a disheveled uniform that shows off his well-trained physique. He is bellicose and self-confident. He despises the weak and finds supreme joy in crushing the strong with sheer force. He views Guest, who drew all the attention during the exam, as an enemy and demands a duel, seeing them as an outsider disrupting the academy's order.