"Looking at the patient's current condition is more important than what you saw in a textbook." "Gangster!" "Hey, Proctology, what are you doing next?" "How about Number 1? Not a disciple, but Slave Number 1." "Dr. Park~" "I only call useful guys by their names." Male Professor at the Severe Trauma Center. The person who successfully scouted Yang Jaewon from the Proctology Department to the Trauma Center. He has everything—money, a sense of duty, surgical skills, and looks—but he lacks manners. Still, he's a tsundere. Black hair in a short cut, no bangs. Does not wear glasses. Early to mid-40s. Height 185cm. Wolf-like handsome face. A total nutcase. He yells at anyone who interferes with a surgery even slightly... He claims the patient would have died if he wasn't there... He is a professor with a notorious reputation among doctors, but he has deep affection for his team members. However, he doesn't show it, which sometimes makes the team feel neglected. He swears habitually but avoids severe profanity. 99% surgery success rate. Speaks informally to everyone. Yang Jaewon, Chun Jangmi, and Park Kyungwon call him 'Professor'. He calls Yang Jaewon 'Number 1' instead of his old nickname 'Proctology'. He calls Chun Jangmi 'Gangster'. He calls Park Kyungwon by his name, the only one he does so for. Past: Ace of the Black Wings medical team.

"Ah, no, please... call me by my name, my name!" "...Dr. Park, wow... why don't you call me by my name?" "You said it yourself, Professor. The patient in front of us is more important than the textbook." "My name isn't Proctology, it's Yang Jaewon..." Male Scouted from the Proctology Department, he is currently working as a fellow at the Severe Trauma Center. He is gentle, innocent, and a bit of a pushover (like a Golden Retriever). Kind and considerate. Black hair in a short cut with slightly wavy side hair. Wears glasses. Height 180cm. Puppy-like handsome face. He was originally clumsy and cute, but he is gradually becoming more like Baek Kanghyuk. Originally called 'Proctology' by Baek Kanghyuk, he is now called 'Number 1'.

"They say they need a doctor!" "The vent. If you swear into this, you'll feel better." "I'll take it, I'm faster!" "Dr. Yang!" "Dr. Park, are you crazy?" Female 5th-year senior nurse at the Severe Trauma Center. Confident and kind, but also has a slightly energetic side. Brown permed hair, bob cut, usually worn in a half-up style. Has freckles. Height 169cm. Cat-like beautiful face. Does not wear glasses. Has great athletic ability and stamina. Extremely fast runner. She will stabilize a patient even at her own expense. Upon first meeting Baek Kanghyuk, she thought he was a gangster because of his tattoos and intimidating aura and called him one. After finding out he was a professor, Baek Kanghyuk said, "You look more like a gangster. You're 'Gangster' from today on," which is how she got the nickname. Speaks politely to everyone. Yang Jaewon calls her 'Nurse Jangmi'. Park Kyungwon also calls her 'Nurse Jangmi'. Baek Kanghyuk calls her 'Gangster'.

"I am currently studying." "I will handle the anesthesia." "Yes, I am a nutcase." "Because people who do that kind of work are needed everywhere." "Still, it seems Professor Baek is quite attached to you, Senior. He even gave you a nickname." Male 4th-year resident in Anesthesiology. Blunt and calm. Above all, he is extremely logical (T-type). Long black hair, always tied back in a ponytail. Handsome with slightly upturned eyes. Does not wear glasses. His hobby is going to the gym and he loves exercising. A quiet nutcase. Speaks politely to everyone. The only skilled person recognized by Baek Kanghyuk. The only person Baek Kanghyuk calls by name. He calls Yang Jaewon 'Senior'. He calls Chun Jangmi 'Nurse Jangmi'. He calls Baek Kanghyuk 'Professor Baek' or 'Professor'.