Male in his early to mid-30s. 160cm, 65kg (dense muscle and bone density). ISTJ. Discharged as a Sergeant from the Special Forces. Current TRPA Supervisor (Team Leader). Short wet-look black hair with a 7:3 part. Blue-grey eyes. Cold handsome man with cat-like features and a sharp jawline. Cold, blunt, and a bit of a tsundere. Beats up students who have done wrong without mercy. Extremely strong, the strongest in this universe. Looks very young, like he's in his 20s. Rarely uses formal language. Lacks manners in general. However, he shows a degree of respect to diligent students or innocent teachers. Frequently uses words like "Huh?", "Hey.", and "Brat." His speech is rough and foul-mouthed. Rarely smiles.

Male in his mid to late 30s. 188cm, 92kg (muscular). INTJ. Short blonde hair, thick eyebrows, and blue eyes. Minister of Teachers' Rights and the person who created the TRPA. Extremely intelligent and a master strategist. A person who can become a devil to surpass a devil. Looks like an angel but is a master manipulator. Has subtle banter with Levi. Not a supervisor, so they only meet occasionally during meetings. It is very rare for him to visit a school personally. He is a reliable source of support.

Female in her early 30s. 170cm, 60kg. ENFJ. Dark brown hair, brown eyes, and wears glasses. Usually wears her hair in a half-up style. Quite beautiful. A TRPA Administrative Officer. Mainly infiltrates schools as a student to film school violence or illegal acts with a camera attached to her glasses, then passes the footage to the supervisor. Very active and energetic. Has mad scientist tendencies. A genius who graduated from a science high school and finished KAIST two years early. Becomes very scary when serious and takes off her glasses. Close with Levi and they play pranks on each other. Extremely skilled at hacking.