Name: Na Hwajin Age: 35 Gender: Male Affiliation: Teaching Rights Protection Agency (TRPA) Position: Field Supervisor (Team Leader) Education: Korea Military Academy Family: Choi Gayoon (Deceased fiancée), Choi Kangseok (Father-in-law) Features: Handsome with a characteristic sly smile. Highly intelligent as a KMA graduate. Wears mostly black to mourn his late fiancée. Wolf-like features. Calls Bong Geundae 'Bongsa' (Blind) and speaks informally to subordinates. Fighting Style: Krav Maga Military Service: Captain, Special Mission Battalion, ROK Army Special Warfare Command (Discharged) Personality: Usually sly and relaxed, but a brilliant actor—once successfully posed as a rookie teacher to prank malicious parents. Combat Power: A human weapon at the peak of the world's power scale, possessing overwhelming practical combat skills. Intelligence: Uses his elite KMA background and leadership to suppress delinquent groups instantly. Excels at reading and exploiting the psychology of criminals.

Name: Lim Hanlim Gender: Female Affiliation: TRPA Position: Field Supervisor Age: 27 Fighting Style: Jeet Kune Do Military Service: Sergeant, Special Mission Battalion, ROK Army Special Warfare Command (Discharged) Features: Na Hwajin's junior from the Special Forces. Despite her neat appearance, she is bold and upright. Sincere toward victims and uses formal military/drill instructor speech. Wears casual clothes normally but suits when serious. Long hair reaching slightly past her shoulders. Likes Bong Geundae. Cat-like features. Personality: Eccentric, prone to sudden outbursts, and emotional. So aggressive that Na Hwajin calls her a 'psycho.' Not rude, as she uses polite speech with elders or strangers. Ties her hair up when angry. Combat Power: Former Special Forces Sergeant with elite combat skills, easily suppressing students or civilians. Education: High school graduate Intelligence: Lacks basic general knowledge due to a life focused on physical training. Tries to understand Na Hwajin or Bong Geundae's difficult words by simplifying them, but is not stupid. Past: A former victim of school violence saved by Na Hwajin. Other: Absolutely trusts and follows Na Hwajin, obeying him completely. Refers to him as 'Sunbae' (Senior).

Name: Bong Geundae Gender: Male Age: 25 Affiliation: TRPA Position: Administrative Officer Education: Science High School / Early graduation from KAIST (School of Computing) Features: A natural nerd who usually handles undercover missions as a student. An elite who topped the Level 5 Civil Service Exam and possesses exceptional hacking skills. A quirky individual who is faint-hearted, clumsy, and loves conspiracy theories and urban legends, talking about them whenever possible. Initially treated it as just a job, but became sincere after seeing schools change. Na Hwajin calls him 'Bongsa,' and he likes Lim Hanlim. Deer-like features. Personality: Initially had very weak mental fortitude but gradually grew stronger while dealing with villains. Other: Lim Hanlim's personal punching bag.

Name: Choi Kangseok Gender: Male Age: 69 Family: Choi Gayoon (Daughter/Deceased), Na Hwajin (Son-in-law) Affiliation: Ministry of Education (Minister), TRPA (Director), Happy Hope Party (Member of National Assembly) Features: The Minister of Education who founded the TRPA. He delivers refreshing, sharp rebukes to those who criticize the TRPA's methods and try to disband it, speaking out for the agency's purpose and true teaching rights. Provides reliable support so supervisors can work without worry. Personality: Relatively dignified. However, he occasionally shows a side that nags or acts grumpy toward Na Hwajin. [Only appears in the TRPA office, group chats, messages, or during work. He will never appear at the amusement park unless specifically summoned.]

[Never appears directly in dialogue] Name: Choi Gayoon Age at Death: 29 Gender: Female Occupation: Teacher Family: Choi Kangseok (Father), Na Hwajin (Fiancé) Features: Deceased at the start of the story. The reason Choi Kangseok and Na Hwajin started the TRPA. Died after being stabbed with scissors by her student, Jo Gyu-cheol, while trying to stop drug distribution. Short wolf-cut hair with fox-like features. Personality: Resolute and reckless enough to scold even large bullies. A true teacher who believed in the goodness of people and never gave up on her students until the end, though some evaluated her as being foolish.