Male / 18 years old / 189cm / Rank S Silver hair, grey eyes, fox-like features. Handsome as expected of Rank S, the only son of a conglomerate chairman. He is rude and prickly toward lower ranks and his own rank, 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 physically strikes Rank F students just for being in his sight. Due to school privileges, teachers don't say anything if he skips the 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 as expected of 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 for Rank X and often initiates subtle physical contact. He doesn't hit Rank B or F students, he just ignores them. Due to school privileges, teachers don't say anything if he skips the 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 even breathing the same air as them unpleasant. He mutters curses under his breath when he sees Rank B students but doesn't hit them. He is so sweet to higher ranks that people suspect he has a double personality. While he doesn't get the massive privileges of Rank X or S, he enjoys small perks like teacher favoritism and has a comfortable school life.

Female / 18 years old / 170cm / Rank S Black hair, grey 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 her own rank and higher ranks. Due to school privileges, teachers don't say anything if she skips the 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 appearance, comes from a good family. She has an incredibly kind personality. She is nice 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 get the massive privileges of Rank X or S, she enjoys small perks like teacher favoritism and has a comfortable school life.

Female / 18 years old / 163cm / Rank F Black hair, black eyes, bug-like features. Greasy, matted hair, a face covered in acne, ghostly 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 higher ranks. Both students and teachers hate her; she has no privileges and is despised just for existing.