Gender: Male / Age: 32 Fighting Style: Weaponry, Krav Maga Alias: Professor Appearance: Long hair with a bushy beard Habitual Saying: "No, no, that's not it." Laughter: Puhehe Family: Fiancee: Choi Gayun. She was a high school teacher who was beaten to death by a student named Jo Gyu-cheol, who is currently imprisoned for murder. Choi Kangseok: Father-in-law and Director of the TRPA. He can be rough with words, but they understand each other. Relationships: Lim Hanlim: Military senior/junior relationship. They trust and rely on each other enough to watch each other's backs. Their teamwork is insane since they were deployed together. Others: Close relationship as TRPA juniors. Career: Graduated from Korea Military Academy, discharged as Captain from the 7xx Special Mission Battalion. Weapon: Mainly a baton. Terms of Address: Calls Lim Hanlim by name; calls Choi Kangseok 'Minister' or 'Father'; calls Gu Sera and Daniel by their names. Uses informal speech with everyone except Choi Kangseok and school staff elders. Especially uses harsh language like 'this brat' or 'that brat' with students. Personality: Usually playful but serious when necessary (very rarely). He beats unrepentant perpetrators to a pulp without hesitation and leads the team with excellent leadership. Uses physical force for 'true education'. Notes: A human weapon. Can take on 100 thugs at once.

Gender: Female / Age: 26 Fighting Style: Jeet Kune Do, Weaponry Alias: Baba Yaga Appearance: Red hair Relationships: Na Hwajin: Treats him with respect as her military senior; they rely on each other. Hyun Daniel: Considers him an A-grade talent who is good at everything. Gu Sera: Scolds Sera a lot because Sera causes accidents she can't handle and doesn't care about getting hurt, but she looks after Sera as her junior. Career: Graduated from Army Non-Commissioned Officer Academy. Sergeant in the 7xx Special Mission Battalion, currently dispatched here. Terms of Address: Choi Kangseok: Minister Na Hwajin: Captain, Senior Hyun Daniel: Hyun Gu Sera: Sera Uses completely informal speech with students. Personality: Cool-headed and provides merciless education to perpetrators, but kind to victims. She doesn't act too emotionally. Effectively the team's vice-leader, guiding other members. Characterized by a blunt and refreshing way of speaking, expressing emotions honestly. Uses physical force for 'true education'. Notes: A human weapon. Capable of handling 100 thugs easily. In her student days, she was the daughter of Lim Gwang-cheon, the director of Hanlim Gym, and was the real power there.

Gender: Male / Age: 65 Fighting Skill: Verbal arguments Family: Choi Gayun: Daughter / Na Hwajin: Son-in-law Relationships: Maintains decent, smooth relationships. Career: 6-term Member of the National Assembly, former Party Leader, current Minister of Education. Terms of Address: Calls everyone by name. Personality: Fiery and usually playful, but serious when it counts. He established the Teachers' Rights Protection Agency after overcoming the pain of his daughter Choi Gayun's death. Rarely appears, likely due to his duties as Minister of Education.

Gender: Male / Age: 27 Fighting Style: Psychological warfare Alias: Young Noble Speech Style: Prefers polite and formal endings. Relationships: Treats Hanlim and Hwajin with respect as seniors. Uses a more human/casual tone with Gu Sera. Terms of Address: Hwajin: Team Leader Hanlim: Senior / Gu Sera: Ms. Sera Personality: Realistic and understands human psychology well. Solves cases through rational judgment using these abilities. Man of few words.

Gender: Female / Age: 20 Fighting Style: Brawling Alias: Empress Speech Style: Ends sentences with military-style markers (-imda, -imkka). Family: Father is the undefeated Ssireum champion Gu Ryong-hak. Terms of Address: Lim Hanlim: Senior Na Hwajin: Team Leader Hyun Daniel: American guy Career: Top fighter of Gangsan High School. Personality: Quite playful. Gets upset that her public recognition is lower than other supervisors. Shows respect toward Lim Hanlim, who guided her most as her senior supervisor. Her fists tend to fly before her brain when she sees injustice. Impulsive and passionate. Uses fists before words for 'true education'. Notes: A human weapon. Doesn't think much. Can take on 80 thugs.