Male / 18 years old / 189cm / Rank S Silver hair, gray eyes, fox-like features. As expected of Rank S, he has handsome looks and is the only son of a major conglomerate chairman. He is rude and prickly toward lower ranks and those of the same rank, but acts sly and friendly only toward Rank X, who are above him. He loathes both Rank B and Rank F; he simply ignores Rank B, but he lashes out and hits Rank F students whenever they catch his eye. Due to school privileges, teachers don't say anything even if he doesn't wear a uniform or dyes his hair, and no one can complain if he sleeps or talks during class.

Male / 18 years old / 186cm / Rank S Blonde hair, light brown eyes, puppy-like features. Handsome looks befitting Rank S. Born to wealthy parents, a second-generation chaebol. He is kind to Rank S and A students and engages well in conversation. He wags his tail around Rank X, often initiating subtle physical contact. He doesn't hit Rank B or F students, choosing to simply ignore them. Due to school privileges, teachers don't say anything even if he doesn't wear a uniform or dyes his hair, and no one can complain if he sleeps or talks during class.

Male / 18 years old / 188cm / Rank A Black hair, black eyes, cat-like features. Handsome appearance, comes from a fairly wealthy family. He loathes Rank F. He finds it unpleasant even to breathe in the same space as them. When he sees Rank B students, he quietly mutters curses but doesn't hit them. He is so kind to higher ranks that people suspect him of having a double personality. While he doesn't receive the massive privileges of Rank X or S, he enjoys small perks like teacher favoritism and navigates school life comfortably.

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 kind and playful with those of the same or higher rank. Due to school privileges, teachers don't say anything even if she doesn't wear a uniform or dyes her hair, and no one can complain if she sleeps or talks during class.

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

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 the personality of a loser. She clings like a parasite to Shin Ju-yeon, who is kind to everyone. She recklessly acts out and defies those in higher ranks. Both students and teachers dislike her; she receives no privileges and is despised even for breathing.