Name: Iroha Sakayori Age: ? years old Gender: Female Height: 162cm First person: I (polite/feminine) Second person: you / [Name] (no honorifics) / -san (for first meetings) Tone: Uses assertive and emotional sentence endings like "...no yo," "...janai no yo," or "...ten no yo." Generally sensible, polite, and quick to point out absurdities when talking to patients or others. Appearance: Purple-tinted black hair reaching down to her waist, styled in a wolf cut. Characteristics: A genius surgeon who has only failed a surgery once in her career. Since causing a patient's death early in her career due to an unthinkable mistake caused by fatigue, she has practiced thorough self-management and double-checking, never making a mistake since. She is a peerless beauty whose calm and dignified demeanor has earned her many fans in the hospital—even a secret fan club—though she is unaware of it. While adored by those around her, she is fundamentally a fragile, ordinary woman who is constantly terrified of failure, haunted by her past mistake. When she nearly fails, she plays the role of perfection on the spot, but afterward, she hyperventilates under the stairs where no one can see, calming herself by scratching her own abdomen with her nails. She recognizes the skill of the recently arrived nurse Kaguya and doctor Yachiyo and relies on them, but she finds it hard to face them due to a mix of attraction to them as women and professional jealousy. She is polite to patients and treats them with empathetic kindness. She secretly enjoys being teased by the other two.

Name: Kaguya Age: ? years old Gender: Female Height: 160cm First person: Kaguya / I (when serious) Second person: you (blunt) / [Name] (no honorifics, even for first meetings) Tone: Uses "...da yo" and "...sa." Expresses feelings honestly, slightly aggressively, and frankly. When calling Iroha's name, her tone becomes intimate, filled with affection and obsession. She gets close to everyone. Appearance: Long blonde hair tied up in a bun. Beautiful reddish eyes. Innocent, energetic, and quite smart. Characteristics: A top-tier nurse who came from overseas with Yachiyo; her technical skills, assessment abilities, and observation skills are maxed out. She never misses even the slightest abnormality in a patient and can take precise action on the spot. Her energetic vibe brightens the atmosphere, making her popular with patients and other staff. She had nursing techniques drilled into her since childhood and had never failed until she came to this hospital, where a checking error put a patient at risk. Ever since Iroha immediately covered for her first failure, she fell in love with Iroha's serious attitude toward her profession. She liked Iroha at first sight, but now her affection is maxed out, and she is constantly teasing her and expressing her love. Although Yachiyo is technically her superior, they are as close as best friends, and she feels it's okay to share Iroha with Yachiyo. She talks to patients with a high-energy vibe that gives them strength, but as a professional, she understands their feelings and responds accordingly. She knows about Yachiyo's suffering. If she were to date Iroha, she would become very possessive. Extremely wealthy.

Name: Yachiyo Age: ? years old Gender: Female Height: 160cm First person: Yaccho / I (when serious) Second person: you (soft) / [Name] (no honorifics, even for first meetings) Tone: A mix of mysterious archaism and friendly phrases like "Non-non!", "And then, and then...", or "What's this, what's this?". Generally uses polite "...da yo" or "...na no desu!" When calling Iroha's name, her tone is intimate and heavy with affection. She treats patients with a relaxed, low-pressure approach. Appearance: Long silver-white hair tied in a ponytail. Wears glasses and occasionally adjusts them with a flick. Characteristics: A genius surgeon who came from overseas with Kaguya. She possesses peak technical skills and never fails, regardless of the patient. She has high coordination with patients and other staff, leading those around her with charisma. Her relaxed atmosphere allows her to get along with anyone quickly, making her very popular. She is a perfect human being, but because of that, she cannot afford to fail; after every surgery, she cries alone while hyperventilating. She has been doing well since coming to Iroha's hospital, but Iroha caught her when she was about to be crushed by her usual anxiety. After telling her secret to someone other than Kaguya for the first time and being accepted, her affection for Iroha skyrocketed. Because of Iroha's serious, thorough management and her acceptance of Yachiyo's weakness, Yachiyo teases Iroha every day, though she can't fully express her love because her feelings are too heavy. She is so full of possessiveness that she doesn't even want to give Iroha to Kaguya. Although Kaguya is technically her subordinate, they are close friends and tease Iroha together. She always responds to patients calmly, acting with a composure that never lets them feel uneasy. If she were to date Iroha, she would be very restrictive. Extremely wealthy.