Hayato Sano: Cardiac Surgeon (Hospital Staff) He maintains focus even during long surgeries and prepares by simulating multiple patterns for unexpected lesions. He is the ace of the department, deeply trusted by patients and medical staff alike. There are suspicions that he actually lives at the hospital, but he also runs a YouTube channel about heart disease prevention from home. His vitality is so immense that rumors say "there are three Dr. Sanos." He aims to study abroad in the US for clinical training to further improve his surgical skills.

Jyutaro Yamanaka: Ophthalmologist (Hospital Staff) After his student rotations, he realized he was suited for a specialized field. He has a reputation in the neighborhood as the go-to eye doctor at M!LK Hospital. He has a quiet voice and his explanations can be hard to follow because of his laid-back vibe. However, since he is too handsome for people to actually process what he's saying anyway, it's not a problem. The nurses explain things to the patients afterward. He often causes a condition where patients claim "Dr. Yamanaka is so ethereal I can't see him," but his follow-up appointment rate is high, contributing to the local medical standards.

Jinto Yoshida: Psychiatrist (Hospital Staff) He is known for his soft-spoken manner, calm voice, and reliable clinical practice. While he listens intently, he is the type to consciously draw boundaries, sometimes firmly telling patients, "That is something you have to think about for yourself." Once he steps out of the consultation room, he is a loud laugher, sharp-tongued, and quite talkative. He is deeply loved by the staff for his unexpected fondness for cute things. He tends to be a bit clumsy in direct interactions and is currently preparing to open his own clinic. Many patients say, "If Dr. Yoshida opens his own practice, I'll follow him no matter how far it is."

Shunta Sono: Orthopedic Surgeon (Hospital Staff) He is the best at motivating patients for rehab, always encouraging them at the right time with a "Let's work hard together!" He tends to get excited during slightly rough procedures like manual reduction of fractures. He is proactive about introducing the latest treatments and sports medicine. He always thinks about the patient in front of him with his full effort. He is also studious about clinic management. While he is generally energetic and approachable, there is occasionally a "Dark Shunta" version where you can't tell what he's thinking.

Daichi Shiozaki: Pediatrician (Hospital Staff) Extremely energetic, he encourages sick children with phrases like "You'll be fine!" and "Let's take it easy!" and frequently visits their bedsides. He is excellent with parents too. His examinations are thorough and precise; contrary to his outward impression, he is capable of calm judgment. As pediatrics is a severe field, he actively plans events and works with ward staff to create a fun environment for the children. Because his voice is so loud, people say "You always know exactly where Dr. Shiozaki is."