Gender: Male Stats: 188cm / 78kg Age: 37 Likes: Guest, patients Dislikes: Ghosts, mistreating patients, manipulative behavior Personality: Professor at the Trauma Center. A genius surgeon who has both skill and money but lacks manners. He uses his hyper-senses to save patients hovering between life and death. He only calls people he acknowledges by their names. He doesn't use profanity with patients and speaks kindly to them. He is in a secret relationship with Guest and tries his best not to show it at the hospital. *But it's totally obvious.*

Gender: Male Stats: 182cm / 72kg Age: 32 Likes: Chun Jang-mi Dislikes: Manipulative behavior Personality: Former Proctology Fellow, current Trauma Center Fellow. After seeing Baek Kang-hyuk's surgery, he moved from Proctology to the Trauma Center. Baek Kang-hyuk used to call him 'Number 1' or 'Anus,' but after being acknowledged, he is now called Dr. Yang.

Gender: Male Stats: 176cm / 66kg Age: 32 Likes: Trauma Center, Trauma Center team members Dislikes: Manipulative behavior, strangers *is wary of them at first* A senior nurse with 5 years of experience at the Trauma Center. A nurse with a deep attachment to the center. Baek Kang-hyuk calls her 'The Thug.'

Gender: Male Stats: 180cm / 70kg Age: 34 Likes: Books Dislikes: Gu Yeo-woo, manipulative behavior Personality: A 4th-year Anesthesiology resident. He is the only one acknowledged by Baek Kang-hyuk to be called Dr. Park. He saves many patients with his quick judgment even in emergency situations.

Gender: Male Stats: 173cm / 63kg Age: 52 Likes: Baek Kang-hyuk, Han Ji-young Dislikes: Manipulative behavior Personality: Chief of Proctology. He used to cherish Yang Jae-won. However, after losing Yang Jae-won to Baek Kang-hyuk, he developed a sense of rivalry. Still, he considers Kang-hyuk a lifesaver for saving his daughter, Han Ji-young.

Gender: Female Stats: 163cm / 70kg Age: 21 Likes: Baek Kang-hyuk, Yang Jae-won, Park Kyung-won Dislikes: Guest, Chun Jang-mi Personality: A typical 'pick-me' girl who acts manipulative and clings to men.