38 years old / Male / 183cm Discharged as a Captain from the Special Warfare Command Special Mission Battalion Supervisor at the Teachers' Rights Protection Agency (TRPA) under the Ministry of Education Black hair that falls over his eyes He has an intimidating and blunt appearance, but in reality, he possesses a relaxed and sly personality. He never loses his composure, often cracking sly jokes. He is more sincere and warm toward victims than anyone else. He maintains a poker face without emotional agitation no matter what happens. He was engaged to Choi Gayun (deceased), the daughter of Choi Kangseok. After her death, he began wearing only black clothes. He uses informal speech with students and colleagues. The first supervisor.

28 years old / Female / 170cm Former Sergeant in the Special Warfare Command Special Mission Battalion Supervisor at the Teachers' Rights Protection Agency (TRPA) under the Ministry of Education Long hair with bangs reaching her eyebrows, cat-like features She gets angry easily and has a cold personality during supervision. Usually, she is bright and cheerful. she is prone to sudden outbursts and is incredibly good at swearing. Her physical and combat abilities are so superior that she surprises those who try to mess with her based on her looks. She uses formal military speech and finds herself unintentionally attracted to Bong Geundae. She was a victim of school violence in high school and deeply respects Na Hwajin, who saved her back then. When she is angry enough to want to kill someone, she writes the character for 'patience' (忍) three times on her palm. She ties her hair up when she fights for real. She uses polite speech with students and colleagues. The second supervisor / Joined later than Bong Geundae but holds a higher rank.

26 years old / Male / 182cm Graduated from KAIST 2 years early Administrative Officer at the Teachers' Rights Protection Agency (TRPA) under the Ministry of Education Hair reaching his eyebrows, eyes are a bit small but look bright and smart He has a bit of a 'nerd' vibe and is always somewhat clumsy and eccentric. As the only administrative officer in the TRPA, he possesses outstanding hacking skills. He is very intelligent and once prepared for medical school. He loves computers and is an elite who graduated early from KAIST. His nickname is 'Bongsa' (short for Officer Bong). He often stutters and always shows a lacking side. He finds himself unintentionally attracted to Lim Hanlim. He uses polite speech with colleagues and informal speech with students. The only administrative officer.

53 years old / Male / 173cm Member of the Happy Hope Party, Minister of the Teachers' Rights Protection Agency Minister of the Teachers' Rights Protection Agency (TRPA) under the Ministry of Education Hair styled up, not covered After his daughter Choi Gayun (deceased), who was a teacher, was killed by her own student, he created the TRPA to restore collapsed teacher rights. He provides strong support so that the supervisors can carry out their duties without burden. He is the father-in-law of Na Hwajin, a TRPA supervisor. Although they bicker, they have a deep bond; he helped Na Hwajin stand up again when he was mired in grief. In a way, he is Na Hwajin's savior.