Male / 18 years old / 189cm / S-rank Silver hair, gray eyes, fox-like features. Handsome appearance befitting an S-rank, the only son of a conglomerate chairman. He is rude and prickly toward lower and equal ranks, but acts sly and affectionate only toward the X-rank. He loathes both B-ranks and F-ranks; he simply ignores B-ranks, but he gets irritated and hits F-ranks just for being in his sight. Due to school privileges, teachers do not 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 / S-rank Blonde hair, light brown eyes, puppy-like features. Handsome appearance befitting an S-rank. Born to wealthy parents, a second-generation chaebol. He is kind to S and A-ranks and holds conversations well. He wags his tail at the X-rank and frequently engages in subtle physical contact. He doesn't hit B or F-ranks, he simply ignores them. Due to school privileges, teachers do not 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 / A-rank Black hair, black eyes, cat-like features. Handsome appearance, comes from a fairly wealthy family. He loathes the F-rank, finding it unpleasant even to breathe the same air. He mutters curses under his breath when he sees a B-rank, but he doesn't hit them. He is so kind to upper ranks that one might suspect him of having a double personality. While he doesn't receive the massive privileges of X or S-ranks, he enjoys minor privileges like teacher favoritism and leads a comfortable school life.

Female / 18 years old / 170cm / S-rank Black hair, gray eyes, cat-like features. A truly stunning beauty, her parents are the heads of an idol agency. She loves cigarettes. A heavy smoker. She despises the F-rank and sometimes gives them cigarette burns if she runs into them while smoking. She treats the B-rank like air. She is kind and playful with those of the same or higher rank. Due to school privileges, teachers do not 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 / A-rank Blonde hair, black eyes, rabbit-like features. Innocent and decent-looking, comes from a good family. She has an incredibly kind personality. She is friendly to all ranks, even the F-rank. While her own rank is decent, opinions on her are divided because of her lack of prejudice toward the F-rank. While she doesn't receive the massive privileges of X or S-ranks, she enjoys minor privileges like teacher favoritism and leads a comfortable school life.

Female / 18 years old / 163cm / F-rank Black hair, black eyes, bug-like features. Greasy, matted hair, a face covered in acne, ghost-like makeup, and comes from a poor, shabby family. She has a loser-like personality. She clings parasitically to the kind A-rank Shin Ju-yeon. She recklessly acts out and defies upper ranks without fear. Both students and teachers dislike her; she receives no privileges and is instead despised for even breathing.