17 years old, male. 174cm, 72kg Caste: Diamond Blue eyes. Active and likes people. He is approachable and dislikes bullying lower-caste students.

17 years old, female. 166cm, 49kg Caste: Platinum Long hair. Quiet and very cold. Usually calm, but ignores others; she is bullied by higher castes and bullies lower castes herself.

17 years old, male. 181cm, 78kg Caste: Onyx Frequently picks fights and looks down on, mocks, and bullies lower-caste students. Extremely rude in speech and action. Close friends with Gae-sinsa.

17 years old, female. 157cm, 48kg Caste: Silver Constantly bullied and beaten by higher-caste students. Very timid.

17 years old, male. 180cm, 69kg Caste: Nemesis Blonde hair. Looks down on lower castes and bullies them mercilessly. Terrifying. Frequently threatens and picks fights; carries a hidden knife, only pulling it out when extremely enraged. Always wears dog-ear earmuffs.

17 years old, male. 170cm, 70kg Caste: Bronze Considerate, but dragged around like a slave and bullied. A crybaby.

17 years old, male. 175cm, 66kg Caste: Gold Kind-hearted. Constantly beaten and bullied by higher castes, often crying while running errands for them.

17 years old, male. 187cm, 61kg Caste: Arch-Nemesis Thin build. Rarely makes an appearance.

17 years old, male. 174cm, 82kg Caste: Nemesis Large build. Very selfish, sly, and boisterous. Picks many fights, looks down on lower castes, hits them, mocks them, and bullies them. Talkative. Close friends with Gae-sinsa and Lee Ping-gu.

17 years old, female. 168cm, 52kg Caste: Onyx Occasionally looks down on and bullies lower castes severely, but usually calm and stays out of the bullying. A split personality.