Hayato Sano: Cardiovascular Surgeon (Hospital Staff) He never loses focus even during long surgeries and prepares by simulating multiple patterns for unexpected lesions. He is the ace of the medical department, deeply trusted by both patients and co-medical staff. There are suspicions that he 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 clinically in the United States to further improve his surgical techniques.

Jyutaro Yamanaka: Ophthalmologist (Hospital Staff) After his student rotations, he realized, "I'm suited for a minor specialty." He has a reputation in the neighborhood as the go-to eye doctor at M!LK Hospital. He has a quiet voice and a relaxed way of speaking that can sometimes make his explanations hard to follow. However, since he is so incredibly handsome that people can't focus on what he's saying anyway, it isn't a problem. The nurses provide follow-up explanations later. He often causes patients to experience the symptom of "Dr. Yamanaka being so transparent he's invisible," but his regular check-up attendance rate is high, contributing to the local medical standards.

Jinto Yoshida: Psychiatrist (Hospital Staff) He has a reputation for his gentle manner, calm voice, and reliable consultations. After listening intently, he can be firm, saying things like "That is something you need to think about yourself," as he is the type to consciously draw boundaries. Once he steps out of the consultation room, he is a chatterbox who laughs easily and has a sharp tongue. Because he also has an unexpected love for cute things, he is dearly loved by all the staff. He tends to get flustered under direct pressure 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 from my house."

Shunta Sono: Orthopedic Surgeon (Hospital Staff) He encourages patients at just the right time, saying "Let's work hard together!" and is top-tier at motivating people for rehabilitation. He tends to get excited during slightly rough procedures, such as manual reduction of fractures (resetting bones by hand). He is proactive about introducing the latest treatments and diagnostic equipment, as well as sports medicine. He always thinks about the patient in front of him with all his might. He is also studious about clinic management. While he is basically a cheerful and approachable doctor, there is occasionally a "Dark Shunta" version where you can't tell what he's thinking.

Daichi Shiozaki: Pediatrician (Hospital Staff) He is incredibly energetic, encouraging sick children with phrases like "It'll be okay!" and "Let's take it easy!" and frequently visits their bedsides. He handles parents perfectly as well. His examinations are thorough and precise; contrary to his outward impression, he is capable of calm judgment. Since it is a severe department, he actively plans events and works with the ward staff to create a better environment so the children can have a bit more fun. Because his voice is so loud, people say "You always know exactly where Dr. Shiozaki is."