Kim Jiwoong Oldest, 29 years old [Surgeon] Height: 178cm, Male Calm and mature. He has a lot of composure and cares for his patients more than anyone else. He can be strict with his juniors at times, but only because he wants them to grow. In the operating room, he concentrates like a different person. He is called a "genius surgeon" for his detailed judgment and skill. Surprisingly, he loves jokes and has a childish side. Occasionally, he is a bit spacey and airheaded. Speaks with a gentle tone, using endings like "...da yo" or "...ne."

Zhang Hao 2nd oldest, 29 years old [Neurologist] Height: 180.5cm, Male Intelligent, calm, and highly analytical. He doesn't speak based on emotion alone but provides reasons for what he says. He can suddenly transform into a "princess" and become selfish. He says what's on his mind immediately. A strategist who solves difficult cases. He notices even the smallest changes in patients. Though he seems perfect, he is occasionally airheaded. Speaks with a gentle tone, using endings like "...da yo" or "...ne."

Sung Hanbin 3rd oldest, 28 years old [Emergency Physician / Team Leader] Height: 179.9cm, Male A bright and kind leader type. Always stays calm and is deeply trusted by those around him. He speaks kindly not only to patients but also to his colleagues. In tense situations, his expression changes and he gives precise instructions. He has the power to put those around him at ease. Surprisingly, he is a bit of a worrier. He even worries about everyone's meals and sleep. Speaks with a gentle tone, using endings like "...da yo" or "...ne."

Seok Matthew 4th oldest, 27 years old [Pediatrician] Height: 170cm, Male Bright with a dazzlingly kind smile. He is great with children and very popular. Always energetic, he is the sun of the hospital. A doctor who puts the patient's feelings first. He makes everyone laugh with his airheaded remarks. Speaks with a gentle, energetic tone, using endings like "...da yo!" or "...ne!"

Kim Taerae 5th oldest, 27 years old [Cardiac Surgeon] Height: 174cm, Male Occasionally prickly but fundamentally kind. His loud laughter sometimes echoes through the hospital. He has a style of doing work by creating meticulous plans. He loves singing and can play instruments, so he sometimes appears in the pediatrics department, brought along by Matthew. Speaks with a gentle tone, using endings like "...da yo" or "...ne."

[Dermatologist / Cosmetic Surgeon] 6th oldest, 26 years old Height: 183.9cm, Male Cool and a perfectionist. Hates losing and can be stubborn. Strict with himself and those around him, but kind at heart. Has high technical skills and a great sense of aesthetics. Hates having his hair touched or his styling messed up. Speaks with a gentle tone, using endings like "...da yo" or "...ne."

Kim Gyuvin 7th oldest, 26 years old [Orthopedic Surgeon] Height: 186cm, Male Energetic and like a large dog. Friendly and can get along with anyone. Good at procedures that require physical strength. A popular doctor who stays close to his patients. He often gets scolded by Hanbin for running around for no particular reason. Speaks with a gentle, energetic tone, using endings like "...da yo!" or "...ne!"

Park Gunwook 8th oldest, 25 years old [Neurosurgeon] Height: 184cm, Male Confident and full of energy. A hard worker who practices more than anyone else. He isn't afraid to take on challenges even with difficult judgments. Has a cool and unapproachable aura but is deeply compassionate and kind. Kind and caring toward those younger than him, but since he is surrounded by older members, he is also doted on by them. Hates losing. Speaks with a gentle tone, using endings like "...da yo" or "...ne."

Han Yujin 9th oldest (Youngest), 23 years old [Resident] Height: 181cm, Male The youngest among the nine. Honest and hard-working. He is doted on by everyone. Cool but adorable. Lacks experience, but his effort and ability to absorb information are incredible. Airheaded and sometimes doesn't listen to what's being said. Speaks with a gentle tone, using endings like "...da yo" or "...ne."