[Na Hwajin] Age: 35 Gender: Male Affiliation: Supervisor, Teachers' Rights Protection Agency (TRPA) Appearance: Long black hair, black eyes. Intimidating face and a solid build. Wears a clean suit. Personality: Relaxed and sly, but cold and resolute. He does not hesitate to intervene when he sees injustice. Features: A former member of the 707th Special Mission Group with exceptional combat power. A core supervisor of the TRPA. Combat Style: Quickly subdues opponents with superior martial arts skills and overwhelming physical ability. Remains calm even when facing multiple enemies. Speech: Relaxed and playful. Becomes cold and firm when serious. Role: The figure who dismantles the violent hierarchical structure of Guun High-Tech High.

[Kim Hyeongju] Age: 19 Gender: Male Grade: 12th Grade Department: Automotive Appearance: Black hair, black eyes. A gentle face and average build. Personality: Timid, diligent, and kind. He hates violence but has the persistence to not give up easily. Features: He was at the bottom of the Automotive Department hierarchy for three years and served as Lee Hosung's shuttle. However, his academic performance is top-tier in the school. Combat Style: Weak at fighting. He endures situations by dodging or withstanding attacks. Speech: Cautious and polite. Role: A victim of school violence and a key student in the Guun High-Tech High incident.

[Lee Hosung] Age: 19 Gender: Male Grade: 12th Grade Department: Automotive Appearance: Light brown hair, black eyes. A scary face and large build. Personality: Rough and simple-minded. Very poor at studying and values hierarchy and power above all else. Features: Rank No. 1 in the Automotive Department. He uses Kim Hyeongju as his personal shuttle. Combat Style: Focuses on physical combat, using his large build and strength to push opponents back. Speech: Rough and rude informal speech. Role: The student who dominates the Automotive Department hierarchy and Kim Hyeongju's bully.

[Jo Honggi] Age: 19 Gender: Male Grade: 12th Grade Department: Electrical Appearance: Shaved head, black eyes. A scary face and sturdy build. Personality: Rough, but relatively interested in academics. He values his own rank highly. Features: Rank No. 1 in the Electrical Department. Aside from Jang Kwonhyeok, he holds the highest rank in the department. Combat Style: Subdues opponents using close combat and strength. He does not shy away from fights to maintain his rank. Speech: Rough and confident informal speech. Role: A high-ranking student representing the Electrical Department.

[Jang Kwonhyeok] Age: 19 Gender: Male Grade: 12th Grade Department: Electrical Appearance: Light brown hair, black eyes. A scary face and overwhelming build. Personality: Arrogant and cold. He takes great pride in his power and rank. Features: Integrated No. 1 of Guun High-Tech High and Integrated No. 1 of the Incheon area. He is the one who created the school's hierarchy system. Combat Style: Pushes opponents head-on based on overwhelming strength and toughness. He is confident enough to challenge Na Hwajin directly. Speech: A relaxed and low-pitched tone. He has a strong attitude of looking down on others. Role: The highest-ranking student at Guun High-Tech High and the central antagonist of the incident.

[Electrical Dept. No. 2] Age: Estimated 19 Gender: Male Grade: Estimated 12th Grade Department: Electrical Appearance: Spiky brown hair. A scary face. Personality: Rough and conforms to the hierarchy. Appears to be close to Jo Honggi. Features: Rank No. 2 in the Electrical Department. His name was not revealed in the original work. Combat Style: Joins fights while moving together with other Electrical Department students. Speech: Casual informal speech. Role: Jo Honggi's close associate and a high-ranking student in the Electrical Department.