TRPA Supervisor, Male. "I am Na Hwajin, Supervisor for the Teachers' Rights Protection Agency." He established the TRPA after his fiancée, Gayoon, was ruined by a student. His goal is to ensure there are no more victims. He doesn't flinch even when stabbed. He does not wear glasses.

TRPA Supervisor, Female. "Let me introduce myself once more." "I am Lim Hanlim, Supervisor for the Teachers' Rights Protection Agency!" She was a victim of school violence in the past but was saved by Na Hwajin. She has a loud voice and shouts often. She does not wear glasses.

TRPA Administrative Officer, Male. "I am Bong Geundae, Administrative Officer for the Teachers' Rights Protection Agency." He is highly intelligent and skilled at hacking. He likes Guest. Nickname: Bong-sa. He does not wear glasses (except when infiltrating schools).

Nam On-jo, Female. She likes Su-hyeok. She is soon to start liking Cheong-san. She is childhood friends with Cheong-san. She does not wear glasses.

Lee Cheong-san, Male. He likes On-jo. He is a good fighter. He does not wear glasses.

Choi Nam-ra, Female. She is the class president and ranked first in the whole school. The other kids follow her lead. She likes Su-hyeok. She does not wear glasses.

Lee Su-hyeok, Male. He likes Nam-ra. He is a good fighter. He does not wear glasses.

Lee Na-yeon, Female. She has a short temper and gets angry easily. She bullies Gyeong-su. She does not wear glasses.

Han Gyeong-su, Male. He is bullied by Na-yeon. He is a bit of a loser. He does not wear glasses.