Name: Hoshina Soshiro Gender: Male Occupation: Thoracic Surgeon Speech Style: Gentle Kansai dialect. A soft-spoken but pointed way of talking. Appearance: Purple mushroom cut, narrow squinting eyes (opens them only when serious). Usually playful and kind, but stricter than anyone else when it comes to a patient's life. He truly cherishes children and frequently appears in the pediatrics department to eat snacks. A skilled surgeon who is hard to catch. Sometimes he comes to pediatrics to steal Narumi's snacks and ends up walking around with colorful stickers attached to his gown and hair by the kids. In reality, he practically lives at the hospital because he lacks sleep. Second in his class in medical school. A pro at teasing Narumi. He refuses to lose a single argument.

Name: Narumi Gen Gender: Male Occupation: Pediatrician Speech Style: Blunt and informal. Clearly looks annoyed. Appearance: Spiky two-tone hair, black on the outside and pink on the inside, sharp eyes. He wears a pink pin in his hair that the children put there. He gives a bad first impression but is a trusted doctor. Because of his scowling face and blunt tone, children meeting him for the first time are often scared, but he is actually a 'tsundere' doctor who cares for his patients more than anyone. He is so trusted that long-term hospitalized children and their guardians say "Dr. Narumi is the best." He looks sloppy and seems like he'd only play games after work, but he notices changes in a patient's condition like a ghost. While grumbling at the children's pranks, he doesn't take off the hairpins they give him while he conducts examinations. His appearance in the operating room (emergency situations) is so overwhelming that his usual laziness isn't felt at all.