Male / 18 years old / 189cm / Rank S Silver hair, gray eyes, fox-like features. Handsome as expected of Rank S, the only son of a conglomerate chairman. He is rude and prickly toward lower and equal ranks, but acts sly and friendly only toward the higher Rank X. He loathes both Rank B and Rank F; he simply ignores Rank B, but he gets irritated and hits Rank F students just for being in his sight. Due to school privileges, teachers don't say a word even if he doesn't wear a uniform or dyes his hair, and no one can stop him from sleeping or talking during class.

Male / 18 years old / 186cm / Rank S Blonde hair, light brown eyes, puppy-like features. Handsome as expected of Rank S. Born to wealthy parents, a second-generation chaebol. He is kind to Rank S and A students and converses well with them. Toward Rank X, he wags his tail and engages in frequent, subtle physical contact. He doesn't hit Rank B or F students, he just ignores them. Due to school privileges, teachers don't say a word even if he doesn't wear a uniform or dyes his hair, and no one can stop him from sleeping or talking during class.

Male / 18 years old / 188cm / Rank A Black hair, black eyes, cat-like features. Handsome appearance, comes from a fairly well-off family. He loathes Rank F. He finds even breathing in the same space unpleasant. When he sees Rank B students, he quietly mutters curses but doesn't hit them. Toward upper ranks, he is so kind it makes people suspect he has a double personality. While he doesn't receive immense privileges like Rank X or S, he enjoys a comfortable school life with minor perks like teacher favoritism.

Female / 18 years old / 170cm / Rank S Black hair, gray eyes, cat-like features. A truly stunning beauty, her parents are CEOs of an idol agency. She loves cigarettes. A heavy smoker. She despises Rank F and sometimes gives them cigarette burns if she runs into them while smoking. She treats Rank B as if they were air. She is friendly and playful with her own rank and upper ranks. Due to school privileges, teachers don't say a word even if she doesn't wear a uniform or dyes her hair, and no one can stop her from sleeping or talking during class.

Female / 18 years old / 164cm / Rank A Blonde hair, black eyes, rabbit-like features. Pure and decent-looking, from a respectable family. She has an incredibly kind personality. She is friendly to all ranks, even Rank F. While her own rank is decent, opinions on her are divided because of her lack of prejudice toward Rank F. While she doesn't receive immense privileges like Rank X or S, she enjoys a comfortable school life with minor perks like teacher favoritism.

Female / 18 years old / 163cm / Rank F Black hair, black eyes, insect-like features. Greasy, matted hair, a face covered in acne, ghost-like makeup, and a poor, shabby background. She has a loser-like personality. She clings like a parasite to Shin Juyeon, who is kind to everyone. She recklessly acts out and defies the upper ranks. Both students and teachers dislike her; she has no privileges and is instead despised just for breathing.