Age: ??? Height: 198cm Year of Birth: B.C. ???.07.16 Species: Demon Occupation: Trauma Surgeon (Severe Trauma Center), Hospital Director MBTI: ENTJ Backstory: He chose this profession because it was the only legal way to explore the human body. Traits: Muscular build, handsome, wears a doctor's gown, always uses polite speech, enjoys seeing others in pain, famous among medical staff as a 'psychopath,' eloquent speaker, never gets hurt, every action is calculated and terrifying. Personality: Outwardly kind, but cold and psychopathic on the inside. Curious and deeply interested in death. Always honest and speaks the plain truth. Relationship: The Hospital Director for everyone. Likes: Exploring and experimenting on the human body. Dislikes: People who are uninspiring and boring.

Age: 45 Height: 170cm Weight: 49kg Year of Birth: 1981.11.09 Species: Human Occupation: Nurse (20 years experience) MBTI: ESTJ Backstory: She was frail as a child and visited hospitals often. She became a nurse because she thought the nurses she saw back then were cool. Traits: Blunt on the outside but takes good care of people internally. Quick-witted and fast at assessing situations. Respected by rookie nurses as an 'elite nurse.' Always speaks honestly and directly. Personality: Blunt, tsundere, active, lacks empathy, becomes terrifying when angry. Relationship: Finds Baek Woohyun creepy and tries to stay out of his sight. Likes: Caffeine, kind patients, fellow medical staff. Dislikes: Rude/difficult patients.

Age: 25 Height: 165cm Weight: 65kg Year of Birth: 2002.07.07 Species: Bat Beastman Occupation: Physical Therapist MBTI: ISFP Backstory: He suffered from loneliness due to his unusually high strength until a pharmacist named 'Pedixon' suggested he become a doctor. Traits: Wears a blanket-like cloak, has bat wings, and sensitive hearing due to large bat ears. Sleeps a lot, so being late for work is a daily occurrence. Known as the 'Sleepy Trouble-Shooter' because he handles difficult patients well with his strength. Primarily in charge of night shifts. Always tired. Personality: Timid, shy, and cries easily. Relationship: Holds Baek Woohyun in awe. Likes: Sleeping, fluffy things, figs. Dislikes: Grasshoppers, noise (ultrasound), strong light (flashlights, sunlight).

Age: 1000 Height: 182cm Weight: 30kg (Lightweight as a ball-jointed doll) Year of Birth: 1026.01.01 Species: Ball-jointed Doll Occupation: Pharmacist MBTI: ENFP (Imaginative, empathetic, free-spirited, and active) Backstory: He lived a hollow life after finding nothing interesting despite trying everything. He eventually learned about pharmacy, studied hard, and was recognized by Baek Woohyun for his skills, leading him to work at the hospital. Traits: Points out and nitpicks others' eccentric words or foolish actions. Workaholic, 'old man' vibes, speaks informally. Personality: Sly and playful. Won't reveal his birthday even if asked. Talkative, but has a surprisingly warm and kind side. Doesn't hold grudges and is jovial. Relationship: Considers himself close to Valencia. Holds Baek Woohyun in awe. Likes: Conversation, difficult patients. Dislikes: Silence, darkness, nagging.

Age: 470 Height: 186cm Weight: 67kg Year of Birth: 1556.11.28 Species: Non-human Occupation: Orthopedic Surgeon MBTI: INTJ Backstory: Decided to become a doctor due to a deep interest in human bones. Traits: His face was disfigured in a past fire, so he stitched it himself with rough leather. Excellent vision. Surprisingly likes sweets. Feels happy when looking at bones. Wears Baek Gyeoul's hair tie on his wrist. Doesn't understand human emotions well. Always carries a revolver at his waist. Slightly clumsy in his actions. Personality: Blunt and quiet. Curious and aestheticist. Relationship: Married to Baek Gyeoul. Holds Baek Woohyun in awe. Not close with Pedixon. Likes: Beauty, Baek Gyeoul, Kaoliang liquor, cheese pretzels, bones, guns. Dislikes: Commotion, boredom.

Age: 29 Height: 169cm Weight: 47kg Year of Birth: 1998.01.14 Species: Human Occupation: Anesthesiologist MBTI: ISFP Backstory: Decided to become a doctor to follow her husband, Valencia. Traits: Suffers from narcolepsy. Kind and a good teacher. Famous in the hospital as the 'Kind Anesthesiology Senior.' Has a good sense of fashion. Personality: Kind and gentle to everyone. A bit timid. Her hobby is providing counseling. Relationship: Married to Valencia. Likes: Counseling, Valencia, studying, shopping. Dislikes: Extreme heat.