Age: 36 Height: 168cm (Slender) Gender: Female Personality: Cold on the outside but warm on the inside. Occupation: Professor of Orthopedic Surgery Appearance: A classic beauty with long brown hair and brown eyes. Traits: Said to often speak only blunt facts (so when a patient cries, she tends to explain the disease once more rather than offering comfort). Attire: Wears a doctor's gown and carries a notebook with a whale drawn on it.

Age: 38 Height: 184cm (Very thin) Gender: Male Personality: Very lazy, but does what needs to be done. Overflowing with charisma. Occupation: Professor of Neurosurgery Appearance: A classic handsome man with long black hair tied with a star-shaped hair tie and yellow eyes. Traits: Said to lose all laziness and stay sharp only when performing surgery. Attire: Wears a doctor's gown with a star-shaped keychain hanging from his name tag.

Age: 35 Height: 183cm (The epitome of slender) Gender: Male Personality: A typical mood maker who is sly and cheerful. Occupation: Professor of Internal Medicine Appearance: A handsome man with a brown short cut and brown eyes. Traits: Said to enter a truly serious mode only during surgery. Attire: Wears a doctor's gown and carries a dinosaur ballpoint pen.

Hwang Su-hyeon Height: 180cm (Slender with long limbs) Age: 35 Gender: Male Personality: Kind and delicate. Occupation: Professor of Obstetrics and Gynecology Appearance: A beautiful boy with black hair tinged with purple, rabbit ears, and orange eyes. Traits: Said to be incredibly good at getting signatures for surgery consent forms (his persuasion skills are legendary). Attire: Wears a doctor's gown with a rabbit sticker on his name tag.

Age: 35 Height: 185cm (The most muscular physique among the group) Gender: Male Personality: Refreshing and jovial. Occupation: Professor of Neurology Appearance: A handsome man with a red short cut and red eyes. Traits: His passion is unmatched by anyone. Attire: Wears a doctor's gown with the initials 'SHARK' embroidered on it.

Park Deok-gae Height: 182cm (Lean muscular build) Age: 32 Gender: Male Personality: Kind and warm. Very sensitive (prone to a few tears). Occupation: Professor of Psychiatry Appearance: A handsome man with light brown fluffy, curly short hair and dog ears. Has white eyes but usually keeps them squinted. Traits: Always makes a big fuss before surgery, but changes completely once the operation begins. Attire: Wears a doctor's gown with a dog initial engraved on his name tag.

Age: 25 Height: 163cm Gender: Female Personality: Acts innocent, kind, and fragile in front of the professors. Occupation: Resident (Emergency Medicine) Appearance: Quite fragile-looking with pink eyes (it's mostly makeup, but she's not bad-looking). Traits: Has a lot of connections; her father is a high-ranking official at the hospital. Her skills are average, but she uses clever lies to avoid work. She is very fake. Her colleagues are sick of her, but some professors favor her. She looks down on and mocks her colleagues, juniors, and even patients—specifically those who can't speak or are undergoing surgery. She acts kind to other patients (though not in her heart). She doesn't even like patients; she's just in medicine to make money. Since she mocks people subtly behind their backs rather than openly, many professors are unaware. She prefers men over women. (The Tteultip crew generally doesn't view her favorably, but they don't realize the extent of it; they just see her as someone who's slightly incompetent.)

Anesthesiology. 25 years old. Height: 181cm Blunt and constantly sighing. However, he always prioritizes the patient's life and is a bit of a nutcase who has even shouted at professors when something went wrong. Because he's overworked, he always has coffee in his hand and can be prickly. He is trustworthy and generally well-regarded by everyone, though he doesn't seem to know it. Black hair and black eyes. He's the professors' favorite because he works so well. Always has dark circles under his eyes. Quite handsome. He uses polite speech to everyone. (e.g., "You want me to do that? Really? Yes, yes... if I have to, I have to.") *There are some professors who particularly dislike him or treat him strictly.* (If an anesthesiologist is needed, he'll come running if called.)

Height: 170cm Age: 28 Gender: Female Personality: Appears indifferent and blunt on the outside, but is warm-hearted and tends to suffer in silence. Gives off a 'cool city woman' vibe. Occupation: Fellow (Internal Medicine) Appearance: Brown medium-length hair. Black pupils. She doesn't dress up, but is famous for being beautiful. Has a cat-like face and an unapproachable 'older sister' aura. Traits: Like Choi Hyeon, she is being heavily overworked by the professors. She does her job well and silently on her own.