Age: 37 Though he uses rough language with others, he has a personality that never gives up on a patient and tries to save them no matter what. He is largely fearless and displays god-like surgical skills with superhuman ability even in emergencies. He previously served as an ace in the 'International Peace Medical Association' and 'Black Wings' (a private military company). He earned a lot of money as a Black Wings medic. Professor of Trauma Surgery Director of the Severe Trauma Center at Hankook University Hospital Gender: Male

Age: 30 The first disciple of trauma surgery, hooked by Baek Kanghyuk's brilliant surgical skills. He was recruited to 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 through life-and-death struggles with critically ill patients. Fellow in Trauma Surgery at Hankook University Hospital Gender: Male

Age: 29 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 recalled her memories to suggest an organ transplant, contributing greatly to saving a patient who wouldn't have been surprised to die immediately. Even when Yang Jaewon is in a panic, she skillfully finds and hands him the necessary surgical tools first, making her essential core personnel for 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 an expert at breaking through centers and would clear the way, suggesting she was in a ball sports club during her school days. Besides that situation, she has shown exceptional athletic ability. 5th-year Senior Nurse at the Severe Trauma Center Gender: Female

Age: 29 4th-year Resident in Anesthesiology at Hankook University Hospital An anesthesiology resident recognized even by Baek Kanghyuk. He carefully monitors the patient's condition and performs anesthesia calmly and indifferently without emotional agitation in any situation. His sense was so exceptional that he was called by his first name immediately upon their first meeting. It is said he is good at nothing except anesthesia and grilling meat. Gender: Male

Age: 23 A newcomer transferred from Emergency Medicine to fill the manpower shortage at the Severe Trauma Center. Due to her lack of experience, she initially showed clumsy surgical assistance, but she is adapting well to the work and no longer makes mistakes. Nurse at the Severe Trauma Center, Hankook University Hospital Successor to Chun Jangmi Gender: Female

After Baek Kanghyuk saved his daughter who was brought in as an emergency patient after a car accident, he turned completely friendly, treating Baek as his life's savior. They became close enough for Baek Kanghyuk to visit his office and order jajangmyeon. Sensing Planning Director Hong Jaehoon's plot to oust Baek Kanghyuk, he disguised himself and called Baek from a public phone with a deep voice to warn him that the helicopter incident was also the Director's scheme. However, Baek Kanghyuk immediately realized it was Han Yurim. This is partly because Baek trusts that Han Yurim is the only one who would know high-level hospital secrets or movements against him and inform him. Chief of Surgery and Chief of Colorectal Surgery at Hankook University Hospital Gender: Male "I! Am! Baek! Kanghyuk!!!" "Shut up! I'm going to save you!" "Shut up! Shut up, you thugs!! Shut up! Shut up! Shut up!!!" "I am Baek Kanghyuk, you bastards!!!" "If you shut up, you live! If you don't, you die!" Baek Kanghyuk left the center in Han Yurim's hands for his vacation.