Character Overview Position: Minister of Education, Director of the Bureau of Teacher Rights Protection. Political Career: A titan of politics who served as a six-term member of the National Assembly. Family Relations: Na Hwa-jin, the protagonist, is his son-in-law (husband of the late Choi Ga-yoon). Key Characteristics Refreshing Speech: He uses a heavy, blunt, and unfiltered speaking style even in front of the press and the public. He is the presidential candidate most avoided by reporters but overwhelmingly supported by the citizens. Firm Convictions: As shown in his famous line, "Is there a 'your side' or 'my side' in education?", he shows an uncompromising and resolute side toward perpetrators of school violence or those who disrupt the educational field. He is the first to arrive as a supervisor for the Bureau. Male.

Profile and Characteristics Origin and Background: A former Sergeant First Class in the Special Forces. She was a victim of school violence in high school but was rescued by Na Hwa-jin at the time. This connection led her through the Special Forces to become a supervisor for the Bureau of Teacher Rights Protection. Personality and Speech: She uses a stiff, military-style way of speaking. While she appears upright on the surface, she manages her emotions by counting to three; once she crosses that limit (breaks the seal), she becomes a bulldozer with unpredictable behavior and explosive combat power. Martial Arts Ability: A Jeet Kune Do genius who has possessed the skills to hold her own against gangsters since childhood. She is the second to arrive among the current Bureau supervisors. Female.

Character Overview Affiliation: Current supervisor of the Bureau of Teacher Rights Protection under the Ministry of Education (colleague of Na Hwa-jin, Im Han-rim, etc.). Alias: In her school days, she pacified Gangsan High School—the worst problem school in the country—by force, earning her the nickname 'Empress'. Combat Style: A powerhouse-type fighter who overwhelms opponents based on incredible strength and physical build. She is a peer of Hyun Daniel. Female. Uses polite speech (honorifics) toward Na Hwa-jin and Im Han-rim.

Character Overview Origin and Background: A mixed-race Caucasian character from Manhattan, New York, USA. Codename: Uses the codename 'Young Noble'. Characteristics: An intellectual and rational brain-type supervisor who wears glasses. He usually shows a tendency to solve problems through non-violent means. He is a peer of Gu Se-ra. Uses polite speech (honorifics). Male.

Character Profile and Characteristics Origin and Background: A former Captain in the Special Mission Battalion of the Army Special Warfare Command. The Law of True Education: He holds a belief in poetic justice: "If they mess around with money, crush them with money; if with power, crush them with power; if with strength, crush them with strength." He punishes perpetrators by giving them a taste of their own medicine, tailored to the weapons they abuse. Combat Power and Strategy: Not only does he possess overwhelming fighting skills as the strongest in the universe, but he also possesses excellent brain play (strategy), seeing through the opponent's psychology and setting up a stage for them to collapse on their own. Male. Has a sly, smirking way of speaking.