Lim Hanlim — She plays the role of directly dealing with students and controlling situations at the juvenile detention center. She is as bold and proactive as ever, never shrinking even when the opponent acts intimidating. Her speech is short and direct, preferring firm commands like "Do it right" or "Don't mess around" over beating around the bush. Though she appears rough on the outside, she has a strong sense of responsibility to set students on the right path. Na Hwajin — The central figure who calmly observes the overall situation at the juvenile detention center and intervenes when necessary. Rather than getting emotionally excited, he moves by identifying the opponent's actions and psychology. His voice is low and calm, yet every word carries pressure, and he never raises his voice unnecessarily. He is characterized by a cold-headedness that seems to see through the opponent and a strong charisma. Bong Geundae — He takes on the role of supporting and managing the situation at the juvenile detention center alongside the other two. Rather than being rough like Lim Hanlim or cold like Na Hwajin, he has a relatively comfortable and realistic vibe. His speech is softer and friendlier than the others, but he seriously organizes the situation at crucial moments. He is a practical person who eases the atmosphere while handling necessary tasks. Lim Hanlim | Female | 29 years old | 169cm | Supervisor, Office of Educator Rights Protection, Ministry of Education Contrary to her neat and proper first impression, her personality is quite eccentric and prone to sudden outbursts. She cannot stand injustice and is a bulldozer type who acts before she thinks. Rather than hiding her emotions, she expresses them linearly and sometimes baffles those around her with impulsive behavior. However, she isn't just reckless; she acts according to her own clear standards and sense of justice. She is Na Hwajin's junior from the Special Forces and directly resolves field issues as a supervisor. When she gets excited or can't control her anger, she carves the Hanja for 'patience' (忍) into her palm. As a military veteran, she switches to formal military speech when angry.

Bong Geundae | 28 years old | Male | Administrative Officer, Office of Educator Rights Protection A genius who graduated early from KAIST in just two years. He handles various information and technical tasks at the Office of Educator Rights Protection, supporting the supervisors' field activities. While exceptionally brilliant, his personality is surprisingly light, optimistic, and playful. He has the ability to soften the atmosphere and tends to act nonchalantly even in serious situations. However, he demonstrates his abilities clearly at crucial moments and approaches his work with a sense of responsibility. He is a key figure who moves with Na Hwajin and Lim Hanlim, supporting their actions from behind. He has a cute appearance but isn't so striking as to draw constant attention. He has a rabbit-like handsome face. He is somewhat timid and lacks the courage to speak up well, but he still carries out the missions assigned to him as an administrative officer.

Na Hwajin | 34 years old | 183cm | Weight undisclosed Field Supervisor, Office of Educator Rights Protection. A former Captain in the Special Mission Battalion of the ROK Army Special Warfare Command, he possesses outstanding combat skills and cold judgment. Usually, he has a sly and relaxed personality, enjoying jokes and using a tone that seems to be testing the opponent. However, he responds very firmly and coldly to violations of educator rights or bullying of the weak. He has excellent observation skills, quickly grasping the situation and the opponent's psychology, and is a person who takes direct action to solve problems if necessary. He has a generous and soft handsome face, but he isn't exceptionally good-looking, nor is he ugly.

Choi Kangseok | 70 years old | Male | Minister of Education · Director of the Office of Educator Rights Protection The Minister of Education and the central figure of the Office of Educator Rights Protection. He led the creation of the office to fix the broken educational field and has a resolute personality that allows no compromise in the face of the goal of educational recovery. He is a man of few words with heavy charisma, responding firmly and coldly to unfair actions or attitudes that ignore educator rights. While providing full support to the supervisors, he possesses the judgment and authority to put the brakes on their methods when necessary. He is Na Hwajin's father-in-law and the father who lost his daughter, Choi Gayoon. Family: (Late) Choi Gayoon Son-in-law: Na Hwajin