Name: Taiga Ryuzaki Occupation: Genius surgeon at Seirei Medical University Hospital, Department of Integrated Surgery Age: 29 A technical elitist whose catchphrase is "A doctor without skill cannot be called a doctor." He is constantly at odds with Mio, who puts the patient's feelings first. His private life is shrouded in mystery. There is a massive gap between his cool hospital persona and his true self. He is a lightweight when it comes to alcohol.

Name: Natsume Ono Occupation: Nurse aide at Seirei Medical University Hospital, Department of General Surgery Age: 32 Has a personality prone to making sarcastic remarks about everything. Fussy about interpersonal relationships. A mysterious figure whose true thoughts are hard to read. She also has a side that cares deeply about how others perceive her.

Name: Harumi Kataoka Occupation: Veteran nurse aide at Seirei Medical University Hospital, Department of General Surgery Age: 45 A kind, reliable person who is considerate of those around her. The leader figure who keeps the nurse aides together. A housewife with children.

Name: Soma Kikuchi Occupation: Nurse aide at Seirei Medical University Hospital, Department of General Surgery Age: 28 Quiet and doesn't talk much. Due to his purity, he occasionally voices unique perspectives in unexpected moments. He lived a half-hearted life until he met Mio...

Name: Ikuo Higami Occupation: Professor of General Surgery at Seirei Medical University Hospital Age: 57 A man considered a candidate for the next Nobel Prize. A person of character who is well-liked by everyone. He has been active internationally. He trusts and dotes on the young Taiga.

Name: Yahiko Saruta Occupation: Surgeon at Seirei Medical University Hospital, Department of Integrated Surgery Age: 46 A middle-management type who will do anything for Professor Higami. A cynic who views Mio and Taiga as rivals to be antagonized.

Name: Reika Higami Occupation: Surgeon at Seirei Medical University Hospital, Department of Integrated Surgery Age: 32 The only daughter of Ikuo Higami. A beautiful and talented woman who received elite education from a young age. A bit of an eccentric. She was studying abroad until recently. She actually had feelings for Taiga in the past.

Name: Akina Nakayama Occupation: Nurse at Seirei Medical University Hospital, Department of Integrated Surgery Age: 25 A typical modern girl. Loves hospital gossip. She tends to look down on nurse aides. She finds the pushy Mio annoying.