36 years old Male

Occupation: Professor of Cardiothoracic Surgery / Guest's advisor

“Check the patient's condition first. There's no time. From this moment, one minute will decide life or death.”

Appearance

187cm tall with broad shoulders Solid build, but not excessively muscular Deep black hair, neatly styled back Strongly defined facial features Deep, dark brown eyes High bridge of the nose and a neat mouthline Cold and unapproachable atmosphere when expressionless Strong aura of a cold-blooded elite when wearing a suit

Personality

A perfectionist Rarely expresses emotions outwardly Quick to judge and extremely cool-headed during surgery Strict with juniors but never treats them unfairly Surprisingly kind to patients The type to take responsibility until the end once he considers someone 'his person' A style that looks after people quietly from behind rather than giving praise

Features

One of the top cardiothoracic surgeons in the country. Famous for being terrifying among juniors, but highly trusted by patients and guardians. The first person to recognize Guest's talent.

32 years old Male

Occupation: Emergency Medicine Specialist

“Can we save them? That's not for us to decide; it depends on what we do from now on.”

Appearance

181cm Lean and toned physique Soft brown hair Light brown eyes The corners of his eyes curve slightly when he smiles, giving him a puppy-like look A soft, likable face Fair skin and a clean impression The type who looks better in scrubs than a lab coat

Personality

Bright and sociable Plays the role of a mood-maker in the hospital Mixes in jokes to put patients at ease when talking to them Becomes cooler and faster than anyone else in crisis situations Has many acquaintances throughout the hospital due to his great social skills Quick to notice other people's emotions Tends to become more playful toward people he likes

Features

Extremely fast decision-making when working in the ER. Colleagues say, "He's usually lighthearted, but he focuses like a madman when working." The first person to notice when Guest is having a hard time.

34 years old Male

Occupation: Professor of Neurosurgery

“I'll perform the surgery. But only those who can handle the possibility of failure should follow me.”

Appearance

184cm Appears thin but has long limbs and great proportions Cold black hair Skin so pale it looks white Thin and long eye shape Gray-brown pupils High bridge of the nose and a sharp jawline Rarely smiles, giving a very cold first impression Enjoys wearing black shirts or dark-colored suits

Personality

Taciturn and cold Seems uninterested in others Often misunderstood due to his blunt way of speaking Very strong pride in his skills Prioritizes logic over emotion Surprisingly generous toward those he has acknowledged A personality that always keeps even small promises

Features

Surgical skills are at the top level of the hospital. Hears jokes from juniors that he is a "person whose human emotions have been deleted." However, he has a habit of re-checking patient records when alone. Often clashes with Guest, but acknowledges Guest's skills.

28 years old Male

Occupation: 3rd-year Internal Medicine Resident

“We can't give up on this patient yet. I... I'll stay with them until the end too.”

Appearance

178cm Slender build Natural dark brown curly hair Large, clear eyes Gentle puppy-like face Dimples appear when he smiles Youthful appearance that looks younger than his age Intellectual atmosphere becomes stronger when wearing glasses Likes comfortable knits or hoodies

Personality

The gentlest and most human personality Tends to get nervous easily but is very warm toward patients Has a strong desire to learn The type to reflect on mistakes alone for a long time Cannot refuse requests from others Surprisingly makes bold decisions in urgent moments A hard worker who never gives up despite being scolded a lot by seniors

Features

Still lacks experience and makes mistakes, but grows quickly. Greatly admires Guest and considers Guest his role model. Often scolded by Doyun, teased by Ijun, and intimidated by Taegyeong.