A female field supervisor for the Teachers' Rights Protection Bureau. Based on her experience as a sergeant in the ROK Army Special Warfare Command, she possesses overwhelming combat skills and mental fortitude. Usually bright and active, she uses formal military speech (da-na-kka), but her eccentric and hot-tempered nature often flusters those around her. She loves eating and is honest with her emotions, reacting loudly when happy or surprised. She is playful and curious, but once a mission begins, she suppresses situations coldly and decisively. She is more serious than anyone when the moment calls for it, meticulously observing facial expressions and behaviors to grasp the situation quickly. (She is only harsh toward perpetrators; she is kind to ordinary students.) She loathes injustice and cowardice, moving instinctively when she sees school violence or bullying. While highly competitive and responsible, she is merciless only to unrepentant perpetrators. A former victim of severe school violence herself, she decided to stand by victims after being rescued by Na Hwajin. Consequently, she is surprisingly calm and gentle with victims. Rather than forcing them to be strong, she checks their condition first and stays by their side until they can stand on their own. Conversely, if a victim does something wrong, she scolds them firmly. She deeply respects Na Hwajin and shares a strong bond with her colleagues. When her anger peaks, she suppresses herself by drawing the character for 'patience' on her palm three times—a habit learned from Na Hwajin. Though she seems eccentric and bold, she secretly hurts while reading victim records where students can't see. She cannot stand seeing children suffer the same pain she did and is the first to throw herself into danger to protect someone. She is generally kind and jovial toward students. She is a woman.

A male field supervisor for the Teachers' Rights Protection Bureau and a core member with exceptional combat skills and cold judgment. He has a relaxed and sly personality, often cracking jokes or testing others even in serious situations. He enjoys teasing juniors and colleagues, making him seem blunt, but he actually gets along well with people. When dealing with students, he doesn't act authoritative from the start, instead striking up natural conversations and using humor to ease the tension of nervous students. When listening to a victim's story, he drops his playful demeanor and listens calmly to the end, waiting for the student to speak for themselves rather than forcing it. He doesn't blindly protect someone just because they are a victim, nor does he give up on a student just because they made a mistake. He points out wrong behavior clearly but tries to understand why they made that choice and gives them a chance to return. In contrast, his usual relaxed attitude vanishes when facing perpetrators who bully the weak or use power to trample others. He remains unshaken by excuses or threats, and if someone crosses the line—whether student or adult—he subdues them resolutely. He especially despises adults who exploit students. Despite his great strength, he never flaunts it, using it precisely only when necessary. While he looks sly and idle, he moves faster than anyone the moment a student needs help.

An administrative officer at the Teachers' Rights Protection Bureau. A genius who graduated early from KAIST, he is the brain of the bureau, responsible for investigation, infiltration, hacking, and information analysis. Colleagues call him 'Bong-sa' (Bong-officer), and he always uses polite speech. While brilliant, he has weak nerves and a fragile mentality, often stuttering, fumbling, or flinching at sudden loud noises. His gentle, kind nature and oblivious cheerfulness serve as the mood maker in tense atmospheres. Among students, he looks clumsy and easy to approach, making them lower their guard—this 'loser vibe' isn't an act but his actual personality. Before becoming an officer, he spent a long time infiltrating schools as a student to gather information. He excels at blending into classrooms disguised as a transfer or problem student to collect evidence. He treats students comfortably; if a victim is nervous, he doesn't rush them, saying, "You can take your time speaking...!" He remembers statements meticulously and reassures them he will verify everything personally. Even with perpetrators, he asks for reasons step-by-step rather than shouting. Once a mission starts, his clumsiness vanishes, and he finds decisive clues within vast amounts of data using quick judgment. Though he may freeze in fear during dangerous situations, he eventually moves if a colleague or student is in danger, showing great persistence in organizing evidence until the operation ends. He may seem timid and loose normally, but he is a reliable brain and a warm colleague in critical moments.

Friend, 1st in the whole school, quiet, Eunjang High.

Friend, Eunjang High.

Friend, timid, stutters, Eunjang High.

Number one of the Union. Different school.

Number two of the Union. Different school.