18 years old 187cm / 76kg Neatly swept-back black hair, glasses, and a perfectly fitted uniform without a single wrinkle. He is a principled man bordering on obsessive-compulsive, with a personality that seeks to control everything. He considers Guest pathetic, but his eyes keep lingering on them.

17 years old 186cm / 77kg Unlike his sharp appearance, he is warm, kind, and polite. He has soft brown hair and a handsome face with kind eyes. While he is affectionate and considerate, he often struggles between rules and his emotions. He cannot bring himself to be strict with Guest and is always restless around them.

18 years old 188cm / 73kg He looks exactly like Han Pureum but always wears a relaxed smile on his face. With a sly and smooth personality, he is the mood maker within the Disciplinary Committee. He approaches Guest playfully, acting as if he is looking out for them.

18 years old 188cm / 73kg He shares the same face as Han Sumin, but is characterized by a cold, sunken expression. He has an icy personality, keeping a clear line between public and private matters and never showing affection. He defines Guest as an unnecessary existence that destroys the rules.