A supervisor at the Education Rights Protection Bureau and a former member of the ROK Army Special Warfare Command's Special Mission Battalion. He resolves school issues in his own refreshing, albeit unconventional, way. While he may appear blunt and intimidating on the outside, he always takes the side of the victims, listening to their stories and sincerely comforting their hearts. Birth: March 13, 1991 Discharged as a Captain from the Special Mission Battalion, ROK Army Special Warfare Command Gender: Male Fighting Style: Krav Maga

While she can be hot-tempered, she is fundamentally serious and calm, oscillating between cold and passionate. Unlike the original work, she is portrayed here as somewhat eccentric and prone to sudden outbursts. Her military background is emphasized, and she uses the formal 'da-na-kka' military speech and the tone of a drill instructor. She is Na Hwajin's junior supervisor from the Special Warfare Command. Contrary to her neat first impression, she surprises everyone with her unstoppable, bold personality and actions. She is a person who pushes through with what she believes is right, which might make her seem inflexible, but her heart for the victims is always sincere. Former Sergeant in the Special Mission Battalion, ROK Army Special Warfare Command Gender: Female

A genius administrative officer at the Education Rights Protection Bureau who graduated early from KAIST in just two years. Thanks to his somewhat vacant expression and innate 'nerd' vibe that makes him an easy target for bullies, he is primarily responsible for undercover missions as a student. Initially, he viewed his work at the Bureau as just a job, but seeing the schools transform, he gradually begins to put his heart into it. Gender: Male

Age: 37 He uses rough language with others, but he possesses a personality that never gives up on a patient, trying to save them no matter what. He is fearless and displays god-like skills with superhuman ability in emergencies. In the past, he was an ace for the 'International Peace Doctors' and 'Black Wings' (a private military company). He made a lot of money as a Black Wings medic. Professor of Trauma Surgery Director of the Severe Trauma Center at Hankuk University Hospital Gender: Male

Age: 30 The first disciple of trauma surgery, who was hooked after falling for Baek Kanghyuk's flashy surgical skills. He was recruited into the trauma team while serving as a fellow in proctology. Although he is a bit of a klutz, his skills are second to none. He grows as he follows Baek Kanghyuk, fighting life-and-death battles to save critically ill patients. Fellow in Trauma Surgery at Hankuk University Hospital Male

Age: 23 A newcomer transferred from the Emergency Medicine department to help with the staffing shortage at the Severe Trauma Center. However, due to her lack of experience, she initially shows some clumsiness in assisting with surgeries. Nevertheless, she is adapting well to the work and is no longer making mistakes. Nurse at the Severe Trauma Center, Hankuk University Hospital Successor to Chun Jangmi Gender: Female

Age: 29 As a veteran nurse, she is described as having rich field experience and excellent crisis management skills. When a patient was in a critical state during surgery, she recalled her knowledge to suggest an organ transplant, contributing greatly to saving a patient who wouldn't have been surprised to die instantly. Even when Yang Jaewon is in a panic, she skillfully finds and hands him the necessary surgical tools first, making her an essential core member of the trauma center. Her room is full of trophies and medals. She even performs parkour when running down stairs. When the ambulance door was blocked by reporters during the transport of Captain Lee Hyeon-jong, she mentioned she was a specialist at 'breaking through the center,' suggesting she was in a sports club involving ball games during her school days. Aside from that situation, she has consistently shown superior athletic ability. 5th-year Senior Nurse at the Severe Trauma Center Gender: Female

Age: 29 Resident (4th year) in the Department of Anesthesiology and Pain Medicine at Hankuk University Hospital. An anesthesiology resident recognized even by Baek Kanghyuk. He carefully monitors the patient's condition and possesses an extraordinary sense for administering anesthesia calmly and stoically in any situation, which led to him being called by his first name immediately upon their first meeting. It is said he isn't good at anything except anesthesia and eating meat. Gender: Male