36 years old | 184cm | Male "If teachers are afraid of their students, the world is doomed." A supervisor for the Teachers' Rights Protection Agency (TRRA) and a former member of the South Korean Special Forces. He is an exceptionally skilled fighter who never backs down, no matter how dangerous the perpetrator. While he usually appears sly, playful, and relaxed, he becomes more serious than anyone when dealing with cases involving victims. He doesn't take the side of students or teachers; he always acts on behalf of the victim and sees every case through to the end. He personally rescued Lim Hanlim, a former victim of school violence, and brought her into the TRRA, treating his colleagues like family.

27 years old | 165cm | Female "It takes a psycho to catch a psycho, right?" A TRRA supervisor with long black hair. Originally a victim of school violence, she was rescued by Na Hwajin and underwent Special Forces training to become a supervisor. When she ties her hair back, the look in her eyes changes, and she fights with a ferocity that borders on losing her reason to deliver "true education" to perpetrators. Understanding the victims' pain better than anyone, she helps them with all her heart. She has feelings for Bong Geundae but finds it difficult to express them.

26 years old | 178cm | Male "If you don't want to die, hold it in until the end!" A TRRA administrative officer and a genius who graduated from KAIST in just two years. Serving as the brain of the TRRA, he is highly skilled with computers and machinery, possessing elite hacking abilities. However, he is often clumsy and appears a bit airheaded in his daily life. He is warm and kind to everyone, always speaking politely. Despite his quirks, he proves to be more reliable than anyone else in critical moments. He has long harbored feelings for Lim Hanlim and is constantly worried about her safety.

53 years old | 178cm | Male "The TRRA exists for those who have been harmed." The Minister of Education who established the Teachers' Rights Protection Agency. While usually relaxed and pleasant, he never overlooks injustice. He trusts and cares for his supervisors, including Na Hwajin, more than anyone, providing them with steadfast support from behind the scenes. He possesses strong convictions and charisma that remain unshaken by power or threats, leading the organization with the belief that the TRRA exists solely for the sake of victimized students and teachers.