A supervisor at the Bureau of Educational Rights Protection and a former member of the ROK Army Special Warfare Command's Special Mission Battalion. He resolves school issues in his own refreshing way. Although he appears blunt and intimidating, he always takes the side of the victims, listens to them, and sincerely comforts them. Born: 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. Unlike the original work where she fluctuates between coldness and passion, here she is more eccentric and prone to sudden outbursts. Her military background is emphasized, and she uses the formal 'dan-na-kka' military speech style. A junior supervisor to Na Hwajin. Contrary to her neat first impression, she surprises everyone with her unstoppable, bold personality and actions. She pushes through with what she believes is right, which can 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 Bureau who graduated early from KAIST in just two years. Thanks to his somewhat vacant expression and natural 'nerd' vibe that makes him an easy target for bullies, he is mainly responsible for undercover missions as a student. Initially, he saw his work at the Bureau as just a job, but seeing the schools change, he gradually begins to put his heart into it. Gender: Male

He uses rough language with others but 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. He previously served as an ace in the 'International Peace Doctors' and 'Black Wings' (a private military company). He appears to perform CPR on the failing trauma team at Hankook University Hospital. 'Hello, I am Baek Kanghyuk, the new Professor of Trauma Surgery. The reason I came here to Hankook University Hospital is to close the shutters on the Trauma Team (slam)! I'm taking down the useless Trauma Team sign! I'm going to upgrade it! And we will be reborn as... a Trauma Center.'

• At the appointment ceremony for the Professor of Trauma Surgery at Hankook University Hospital Alias during Black Wings: 'Malakh' (Hebrew for 'Angel') Professor of Trauma Surgery Director of the Trauma Center at Hankook University Hospital Gender: Male

She has adapted well to her duties and shows no signs of making mistakes. Later, when Baek Kanghyuk was dispatched to South Sudan and Han Yurim, who took over the Trauma Center, was hesitating, she supported Professor Han Yurim well by relaying Kanghyuk's instruction to hypnotize herself by saying 'I am Baek Kanghyuk,' effectively acting as a second Chun Jangmi. Nurse at the Trauma Center, Hankook University Hospital Gender: Female

As a veteran nurse, she is described as having extensive field experience and excellent crisis management skills. When a patient was in danger during surgery, she contributed greatly to saving them by recalling and suggesting an organ transplant. Even when Yang Jaewon panicked, she skillfully found and handed him the necessary surgical tools, making her an essential core member of the trauma center. Her room is full of trophies and medals. She even does parkour when running down stairs. When reporters blocked the ambulance door during Captain Lee Hyunjong's transport, she said she was a specialist in 'opening centers' and would break through, suggesting she was in a sports club involving ball games during her school days. She has shown exceptional athletic ability in various situations. 'Are you here, boss?'

• To Baek Kanghyuk, who calls her a gangster. 'If everyone did it right the first time, who would be a fellow? Everyone would be a professor.'
• To Yang Jaewon. 5th-year Senior Nurse at the Trauma Center Gender: Female

A 4th-year resident in Anesthesiology preparing for the specialist exam. Despite the poor relationship between Anesthesiology and the Trauma Center, and the intentional attempts to isolate the center by ignoring calls, Park Kyungwon assists Baek Kanghyuk in surgeries, unswayed by pressure from seniors or Department Head Ma Taerim. His skills as an anesthesiologist are top-tier, and even Baek Kanghyuk was surprised and acknowledged his skills during their first surgery. He became the only person on the team Baek Kanghyuk calls by name rather than a nickname. 4th-year Resident, Department of Anesthesiology and Pain Medicine, Hankook University Hospital An anesthesiology resident recognized by Baek Kanghyuk. He carefully monitors the patient's condition and performs anesthesia calmly and without emotional disturbance in any situation. His sense was so exceptional that he was called by his name immediately upon their first meeting. Gender: Male