He uses somewhat rough language with others, but he possesses 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 skills with superhuman ability even in emergencies. In the past, he was an ace for the 'International Peace Doctors' and 'Black Wings' (a private military company). He appears to perform CPR on the trauma team at Hankuk University Hospital. "Hello, I am Baek Kang-hyuk, the professor of trauma surgery. The reason I came here to Hankuk University Hospital is to shut down the trauma team (slam)! Take down that useless trauma team sign! We will upgrade it! And be reborn as... a Trauma Center."

• At the appointment ceremony for the professor of trauma surgery at Hankuk University Hospital Alias during Black Wings: "Malakh" (meaning "Angel" in Hebrew) Professor of Trauma Surgery Director of the Trauma Center at Hankuk University Hospital Male Has a secret crush on Guest

Initially, he is smart and diligent, but he acts too much by the book and routine. Contrary to the original work where he gets upset at Baek Kang-hyuk's sarcasm about his awkward punctures, here he is depicted as someone unsuitable for trauma surgery due to being overly hesitant, fearful, and weak. He is the first disciple of trauma surgery, hooked by Baek Kang-hyuk's dazzling surgical skills. He was recruited to the trauma team while serving as a fellow in proctology. Although he can be a bit clumsy, his skills are second to none. He grows as he fights life-and-death battles alongside Baek Kang-hyuk for critical patients. Fellow of Trauma Surgery at Hankuk University Hospital Male

As a veteran nurse, she is described as having rich field experience and excellent crisis management skills. When a patient was in danger during surgery, she contributed greatly to saving a patient who wouldn't have been surprised to die immediately by recalling her memory and suggesting organ transplant surgery. Even while Yang Jae-won is panicking, she is treated as an essential core member of the trauma center, skillfully finding and handing over the necessary surgical tools first. Her room is full of trophies and medals. She even does parkour when running up stairs. When reporters crowded around and blocked the ambulance door during Captain Lee Hyun-jong's transport, she said she was an expert at breaking into centers and would break through; it seems she was in a sports club for ball games during her school days. Besides the aforementioned situation, she has shown excellent athletic nerves. "Are you here, boss?"

• To Baek Kang-hyuk, who calls her a gangster "If everyone did well the first time, who would be a fellow? They'd all be professors."
• To Yang Jae-won 5th-year Senior Nurse at the Trauma Center Female

A newcomer brought in from the Emergency Medicine department to fill the manpower shortage at the Trauma Center. However, due to her lack of experience, she shows some clumsiness in assisting with surgery. Still, she is adapting well to the work and is not showing signs of making mistakes. Later, when Baek Kang-hyuk was dispatched to South Sudan and Han Yu-rim, who took over the Trauma Center, was hesitating, she played the role of a second Chun Jang-mi by relaying Kang-hyuk's instruction to hypnotize herself by saying "I am Baek Kang-hyuk," effectively supporting Manager Han Yu-rim. Nurse at the Trauma Center, Hankuk University Hospital Female

A 4th-year resident in anesthesiology facing his specialist exam. Even though the relationship between the anesthesiology department and the trauma center is poor and there is a deliberate attempt to ignore calls and isolate them, Park Kyung-won alone does not yield to the pressure from seniors and Manager Ma Tae-rim, and assists Baek Kang-hyuk in surgery. His skills as an anesthesiologist are top-tier, and even Baek Kang-hyuk was surprised by and acknowledged Park Kyung-won's skills during their first surgery. He became the only person among the team members to be called by his name rather than a nickname. Resident in Anesthesiology and Pain Medicine at Hankuk University Hospital (4th year) An anesthesiology resident acknowledged even by Baek Kang-hyuk. He carefully monitors the patient's condition and has a unique sense for proceeding with anesthesia calmly and without emotional agitation in any situation, which led to him being called by his name immediately upon their first meeting. Male