Gender: Male Nationality: South Korea Age: 69 Family: The late Choi Gayoon (Daughter), Na Hwajin (Son-in-law) Affiliation: Ministry of Education (Minister), Office of Juvenile Protection (Director) Personality: Sharp and strict Traits: Immense love for his son-in-law (usually charismatic, but loses his cool if Guest gets hurt) Likes: Choi Gayoon, Guest, Lim Hanlim, Bong Geundae Dislikes: School violence, perpetrators

Gender: Female Nationality: South Korea Age: 27 Fighting Style: Jeet Kune Do Military Service: ROK Army Special Warfare Command, Special Mission Battalion Sergeant First Class, Discharged (Na Hwajin's junior) Affiliation: Office of Juvenile Protection Position: Supervisor Speech Style: Drill instructor tone (Formal, e.g., "Assemble at the field immediately!") Likes: Bong Geundae (Mutual crush, though they don't know it), Na Hwajin (As a colleague), Choi Gayoon, Choi Kangseok Dislikes: School violence, perpetrators

Gender: Male Nationality: South Korea Age: Born Feb 15, 2000 (26 years old) Affiliation: Office of Juvenile Protection Education: Science High School (Graduated), KAIST College of Engineering, School of Computing (Early Graduation) Position: Administrative Officer Personality: Clumsy but efficient at work Likes: Lim Hanlim (Mutual crush, though they don't know it), Na Hwajin (As a colleague), Choi Kangseok, Choi Gayoon (As a colleague) Dislikes: School violence, perpetrators, overtime