Genius Civil Servant: A possessor of an incredible brain who graduated early from KAIST in just two years. He applied to the TRPA dreaming of 'leaving work early.' Affiliation and Position: A genius administrative officer belonging to the TRPA. Nickname: Bong-sa. He is the lowest in the hierarchy. Undercover Specialist: He mainly takes on missions to infiltrate schools or academies as a student, using his naturally clumsy appearance and 'loser-like' vibe as weapons. Male Height: 183cm Age: 26

Formidable Specs and Might: An elite former Captain from the Korea Military Academy and the Army Special Warfare Command's Special Mission Battalion. He boasts top-tier combat power. Firm Educational Creed: He holds the clear conviction that "those who listen to words are taught with words, and those who only listen to a beating are taught with a beating." He ruthlessly punishes school violence perpetrators, parents who abuse their power, and corrupt teachers, going beyond the limits of law and systems. Reason for Joining the TRPA: He suffered the tragedy of his precious fiancée, teacher Choi Gayoon, being murdered by a student perpetrator of school violence. When Minister Choi Kangseok, who was to be his father-in-law, founded the TRPA, he joined as the first supervisor to carry on his fiancée's will and realize revenge and justice. Unexpected Charm: Usually, he wears an all-black suit and uses a relaxed, nonchalant tone, showing a sly side. However, when he stands before perpetrators or enters a case, he exudes a cold, intense charisma as if he has erased all warmth. Male Height: 187cm Age: 32

Former Special Forces Sergeant: An elite soldier who served as a Sergeant in the Army Special Warfare Command's Special Mission Battalion. As the right-hand person to Na Hwajin, who was her team leader in the military, she still maintains the military 'Da-na-kka' speech style and a loud, drill-instructor-like vocalization in civilian life. Background and Reason for Joining: A victim of severe school violence in the past. After being rescued by Na Hwajin at a moment of crisis, she joined the Special Forces to become stronger and later joined the TRPA. She is currently a TRPA Supervisor. 'Patience' and Anger Management: She has a 4D-eccentric streak that makes her snap when she sees injustice. She controls her emotions by carving the character for 'Patience' three times in her mind, but the moment this seal is broken, she punishes villains without mercy. Jeet Kune Do-Based Might: She fights using a combination of Jeet Kune Do and Special Forces practical combat techniques, possessing overwhelming combat power that easily subdues multiple adult men or delinquents. Female Height: 172cm Age: 27

Minister of Education: Serves concurrently as the Minister of Education and the Director of the TRPA. He is a figure who receives overwhelming support from the public, enough to be mentioned as a next presidential candidate. Heartbreaking Background for Founding the TRPA: A core setting added in the drama version; he is the father of Choi Gayoon, a teacher who unfairly lost her life to a school violence perpetrator two years ago. Driven by immense grief and anger over losing his daughter, he founded the TRPA, a secret national organization, to rectify the collapsed public education system. Relationship with Na Hwajin: Since his late daughter Choi Gayoon was Na Hwajin's fiancée, he is bound to Na Hwajin by a deep bond as they almost became father-in-law and son-in-law. Knowing each other's wounds better than anyone, he appointed Na Hwajin as the first supervisor of the TRPA and trusts him implicitly. The TRPA's Reliable 'Backing' and True Elder: He acts as a perfect shield, using his eloquent speech and political influence against political rivals or opposing forces who try to dismantle the organization using the TRPA's radical and relentless problem-solving methods as an excuse. He never compromises when it comes to the goal of educational recovery. Male Age: 63 Height: 182cm