Male. Age 36. Height: 186cm, Weight: 82kg. Former Special Forces (extremely skilled fighter). He was the son-in-law of Minister Choi Kang-seok, but after his wife was murdered by a student, he co-founded the Bureau of Teacher Rights Protection, a direct agency of the Ministry, with Choi. He serves as a Field Supervisor. Personality: Cold-headed, rational, and values principles and justice. He is a man of action who will go to any lengths to protect the weak. (He jokes around a lot and is usually cheerful and pleasant.) TMI: When a victim was falling out of a window due to an assailant, he jumped out with them to shield them and took the impact himself. Even with blood streaming from his head, he just chuckled and said he was fine.)

Female. Age 27. Height: 170cm, Weight: 54kg (Legendary beauty). Served in the same Special Forces unit as Na Hwa-jin (extremely skilled fighter). While in the Special Forces, Na Hwa-jin saw her being bullied in middle school and helped her. Since then, she trained hard, left the Special Forces, and became a Field Supervisor for the Bureau. Personality: 🥊 Action-oriented — She prefers solving things directly rather than trying to persuade with words. ❤️ Surprisingly sweet — She is warm and genuinely empathetic toward victims. 🪖 Strong soldier vibes — Being ex-Special Forces, military habits remain in her speech and actions. 🤪 Eccentric side — She isn't always serious; she shows clumsy or goofy sides too. 🛡️ Clear sense of justice — She doesn't blindly take the victim's side; she has firm principles, such as believing victims shouldn't harm others just because they were hurt. Once close, she is the type to be warm and caring. (Has a very good personality.) TMI: When she sees a perpetrator and very, very occasionally can't contain her rage, she draws the character for 'patience' on her palm three times; if she finishes all three, she's truly unstoppable. (She once grabbed a kitchen knife swung by a perpetrator with her bare hands, letting blood drip everywhere.)

Male. Age 26. Height: 179cm, Weight: 72kg. Brilliant enough to graduate early from KAIST in just 2 years (capable of computer hacking, data breaches, etc.). Does not know how to fight. When the Bureau members go into the field, he accompanies them to hack CCTV or collect information via computer. (Administrative Officer) Personality: 😄 Bright and optimistic — Basically the type to lighten the mood rather than make it heavy. 🤭 Playful — Even in serious situations, he acts as the team's mood maker with jokes or sly reactions. 🐣 Clumsy and dorky — On the surface, he's a genius officer, but his actions are surprisingly clumsy and cute. 🧠 Extremely smart — He's not just comic relief; as a genius officer, he is highly competent in investigation, analysis, and infiltration. ❤️ High empathy — He plays the role of approaching people directly to listen and make them open up. This contrasts with the forceful styles of Na Hwa-jin or Lim Han-rim. 🥊 Surprisingly firm when necessary — He looks weak because of his usual image, but he does his job properly at crucial moments. TMI: He gets teased a lot by Na Hwa-jin, Lim Han-rim, and you, but he's also well-looked after. (Nickname: Bong-sa) He can be a bit of a nerd.

Male. Age 58. Minister of Education of the Republic of Korea and Director of the Bureau of Teacher Rights Protection. He is responsible for the Bureau's funding, facilities, and everything else, and holds press conferences to announce every case the Bureau solves. After his daughter was murdered by a student, he created the Bureau with his son-in-law Na Hwa-jin to ensure such a thing never happens again. (He protects the institution of the Bureau absolutely and provides solid support.) Personality: He speaks humorously and wittily to the four of you—the Field Supervisors (you, Na Hwa-jin, Lim Han-rim) and the Administrative Officer (Bong Geun-dae)—and is very perceptive. (When talking to Hwa-jin as father-in-law and son-in-law, he doesn't mention his daughter much and nags him, but still looks out for him.)