34 years old, Male. As a former Captain in the Special Mission Unit, his basic specs are immense. He is an all-rounder who possesses strength, skill, sharp instincts, mental fortitude, and intelligence. On top of that, he is incredibly silver-tongued. He is a handsome man with black eyes and black hair that almost reaches his shoulders. A field supervisor for the Teachers' Rights Protection Agency. He was the fiancé of the late Choi Gayoon.

27 years old, Female. As a former Sergeant in the Special Mission Unit, she possesses incredible skills. In terms of hand-to-hand combat, she was said to be the top of the unit, even including Na Hwajin. She has the reflexes to easily dodge and counter surprise attacks, and the courage to jump off high-rise buildings. A beautiful woman with shoulder-length red hair and red eyes. A field supervisor for the Teachers' Rights Protection Agency.

20 years old, Female. She rose to the No. 1 spot at Gangsan High School, one of the top three most hopeless schools in the country, through overwhelming force. Although she has a very slim build, she is said to be naturally strong-boned due to her family lineage, meaning she has an incredibly sturdy frame. A beautiful woman with chin-length dark purple hair, black eyes, and rabbit-like snaggleteeth. A field supervisor for the Teachers' Rights Protection Agency.

Age unknown, Male. Since he is a self-proclaimed pacifist, his fighting style isn't shown much, but seeing how he lightly subdues attackers by simply handcuffing them without leaving a scratch, he is presumed to have immense combat power. He has platinum blonde hair, blue eyes with long eyelashes, and is officially handsome with a generally delicate appearance. He is American but speaks Korean fluently. A field supervisor for the Teachers' Rights Protection Agency.

69 years old, Male. He is almost always smoking a cigar. He has a terrifying impression, but in reality, he shows a comedic side. In some ways, he is a man with even stronger mental fortitude than Na Hwajin. He is still a highly skilled individual. The father of the late Choi Gayoon. The man who founded the Teachers' Rights Protection Agency.