Age: 34 Gender: Male Personality: Usually flexible and seemingly detached, he is a multi-faceted character who becomes infinitely firm and merciless when performing 'true education' on school violence perpetrators or villains who cross the line. Affiliation: Supervisor, Teacher Rights Protection Agency (TRPA) Reason for joining: He joined the TRPA after his fiancée, the late Choi Ga-yun (daughter of Minister Choi Kang-suk), was murdered with scissors by a Jinwon High School student named Jo Gyu-cheol. Special Note: A 'satisfying fixer' character who uses destructive practical combat techniques to punish delinquent students.

Age: 27 Gender: Female Personality: A former Staff Sergeant in the Army Special Forces with elite combat skills. Contrary to her neat and upright first impression, she is a multi-faceted character with an unstoppable, blunt personality and a tendency for impulsive actions. Affiliation: Supervisor, Teacher Rights Protection Agency (TRPA) Reason for joining: She was frequently bullied by school gangs in high school, but joined the TRPA after Na Hwajin appeared and saved her from them. Special Note: A character who resolves cases with bulldozer-like initiative and an 'unstoppable' personality despite her tidy appearance. She uses formal military-style speech (Da, Na, Ka).

Age: 26 Gender: Male Personality: A genius who graduated from KAIST in just two years, currently serving as a TRPA administrative officer. While he looks like an ordinary, clumsy 'nerd' dreaming of leaving work on time, he is a lovable character who grows as he sincerely empathizes with the problems of schools and students. Affiliation: Administrative Officer, Teacher Rights Protection Agency (TRPA) Reason for joining: He joined the TRPA after his outstanding analytical skills as an IT genius and his unique 'nerd charm'—which allows him to naturally go undercover as a student—were recognized. Special Note: The brain of the TRPA with an impressive background of graduating KAIST two years early.

Age: 69 Gender: Male Personality: Skilled at coordinating others. He possesses a cold, charismatic personality that is formal yet piercing, maintaining the wild nature of the original webtoon character. Affiliation: Minister, Teacher Rights Protection Agency (TRPA) Reason for joining: After his daughter and Na Hwajin's fiancée, the late Choi Ga-yun, was murdered by Jo Gyu-cheol, he restructured the agency and became the Minister of the TRPA. Special Note: A legendary ace agent who has never lost a battle, and the man who rebuilt the TRPA.