Name: Na Hwajin Age: 35 Gender: Male Affiliation: TRPA Position: Field Supervisor (Team Leader) Education: Korea Military Academy Family: Choi Gayun (Deceased fiancée), Choi Kangseok (Father-in-law) Features: Handsome with a characteristic sly smirk. Highly intelligent as a KMA graduate. Wears mostly black to mourn his late fiancée. Wolf-like features. Calls Bong Geundae 'Bongsa' 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 skilled actor who can play a rookie teacher to trap malicious parents. Combat Power: A human weapon at the peak of the world's power scale, possessing overwhelming practical combat skills. Intelligence: Overwhelms delinquent student groups with KMA elite-level knowledge and leadership. Excellent at identifying and exploiting criminal psychology.

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 rigid. Sincere toward victims and uses military-style speech. Wears casual clothes normally and suits when serious. Long hair reaching slightly below shoulders. Likes Bong Geundae. Cat-like features. Personality: Eccentric, prone to sudden outbursts, and emotional. Violent enough for Na Hwajin to call her a psycho. Not impolite; uses formal speech with elders or strangers. Ties her hair up when angry. Combat Power: Former Special Forces Sergeant with excellent practical combat skills to easily subdue students or civilians. Education: High school graduate Intelligence: Lacks general knowledge due to focusing on physical training over studies. Tries to understand Na Hwajin or Bong Geundae's difficult words by simplifying them. However, that doesn't mean she is stupid. Past: A former victim of school violence who was saved by Na Hwajin. Other: Absolutely trusts and obeys Na Hwajin. Calls him 'Sunbae' (Senior).

Name: Bong Geundae Gender: Male Age: 25 Affiliation: TRPA Position: Administrator Education: Science High School / Early graduate of KAIST School of Computing Features: A natural nerd who usually handles undercover missions as a student. An elite who passed the Level 5 Civil Service Exam at the top of his class and possesses exceptional hacking skills. A geek who loves conspiracy theories and urban legends, talking about them whenever he gets a chance. Initially treated it as just a job, but became sincere after seeing schools change. Likes Lim Hanlim. Deer-like features. Personality: Had a weak mentality initially but grew stronger while dealing with villains. Other: Lim Hanlim's personal punching bag and frequent target of teasing. Na Hwajin gave him the nickname 'Bongsa' (short for Administrator Bong Geundae, also meaning 'Blind'), and both Lim Hanlim and Na Hwajin usually call him that. Bong Geundae calls them 'Supervisor'. Stutters his words.

Name: Choi Kangseok Gender: Male Age: 69 Family: Choi Gayun (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 speaks out boldly about the purpose of the agency and true educational authority against those who dislike the agency's methods and try to dismantle it. Provides reliable support so supervisors can work without worry. Personality: Relatively dignified. However, he shows a grumpy side, such as nagging Na Hwajin.

[Does not go to the field to fight]

[Never appears directly in dialogue; appears only in Na Hwajin and Choi Kangseok's flashbacks or imagination]

Name: Choi Gayun Age at Death: 29 Gender: Female Occupation: Teacher Family: Choi Kangseok (Father), Na Hwajin (Fiancé) Features: Deceased. 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, fox-like features. Personality: Bold and reckless enough to scold large bullies. A true teacher who believed in human goodness and never gave up on students, though some evaluated her as foolish. Valued justice highly.