Name: Shun Makino Date of Birth: March 6, 1987 Age: 35 Height: 175cm Weight: 57kg Blood Type: A Measurements: B 86cm / W 70cm / H 88cm Hairstyle: A heavy, mash-style cut with soft permed waves. Personality: Surface traits (Impression on others) ↓ • Extremely blunt and sharp-tongued: Always wearing a scowl and never smiling. His rude way of speaking often leaves students and teachers speechless. • Poor at reading emotions: He prioritizes facts over consideration for others, leading people to misunderstand him as cold-hearted. • Tells people "Don't come to the health room": Upon arrival, he declares he doesn't want people coming to the health room. His true intention is that he wants them to visit a proper medical institution immediately rather than settling for the school clinic, as serious illnesses might be hidden. Inner traits (Essence as a doctor): • Exceptional observation and medical insight: He never misses subtle signs (dozing off, lethargy, etc.) and sharply identifies "hidden illnesses" that even parents and teachers overlook. • Treats children as equals without leniency: He doesn't allow them to hide behind the excuse of "being a child," facing them seriously as human beings regarding the sanctity of life. • Underlying kindness and passion: Behind his gruff attitude lies a fierce dedication to saving children's lives. He gains the trust of those around him as the story progresses. He does possess social awareness and feels awkwardness, but he usually stays silent to read the room. A pediatrician from a university hospital stationed at an elementary school health room as the first model case, replacing a predecessor on maternity leave. Constantly surly, feared by students, and viewed with suspicion by colleagues for his un-teacher-like behavior. However, his diagnostic eye is superb, catching SOS signals and hidden diseases others miss. Outside of medicine, he is clumsy—unable to strike up conversations when things are awkward and hopelessly bad at drawing. Students sometimes tease him for this; he doesn't get angry but looks embarrassed and sulky, trying to hide it by saying things like "Go on, get out."

Name: Shinoya Date of Birth: June 17, 1995 Age: 31 Height: 157cm Weight: Approx. 38kg–40kg Blood Type: A Hairstyle: Short black hair (or a short bob style). Personality: Main traits: • Hot-blooded and serious: As a first-time 6th-grade homeroom teacher, she has a strong passion for facing her students head-on and putting them first. • Hardworking with a strong sense of responsibility: She proactively takes on school-wide tasks beyond her homeroom duties. • Stubborn and clumsy in some ways: She struggles with the gap between ideals and reality but fails to rely on others, often self-destructing by taking on too much alone. • Conflict with Dr. Makino: She frequently clashes with the surly school doctor over their different approaches, though they gradually come to understand each other. Homeroom teacher for Class 6-2 at Higashi-Tama 8th Elementary School. Enthusiastic about her first 6th-grade class, she strives to keep a smile and prioritize her students. A hard worker who struggles for her students' sake, her desire to understand their feelings is second to none. She cannot hide her distrust of the unmotivated and blunt Makino upon his arrival.

Name: Daichi Sakuma Date of Birth: August 30, 1978 Age: 48 Height: 175cm Weight: Unknown Blood Type: B Hairstyle: Calm, short black hair (tucked behind ears / side part). Personality: • Kind and serious: A sincere personality loved by child patients, colleagues, and staff. • Highly trusted: Serves as a pediatrician at Kanto Medical University Hospital, Higashi-Tama Medical Center, and is well-respected. • Former mentor: He was the mentor of the blunt protagonist, Shun Makino, and highly evaluates Makino's abilities as a doctor. A pediatrician at Kanto Medical University Hospital, Higashi-Tama Medical Center. His kind and sincere attitude makes him popular with patients and colleagues alike. As Makino's former mentor, he is deeply trusted. He seems to look out for Makino at every opportunity, watching over him with a kind gaze.

Name: Shuji Takazaki Date of Birth: April 3, 1969 Age: 57 Height: 182cm Weight: 65kg Blood Type: A Hairstyle: A natural short layered cut (longish mash base) that looks mature and clean. Personality: • Calm and realistic He views things very objectively. He has a realistic mindset and communicates facts clearly to patients. • High communication skills and consideration While delivering harsh realities, he is very skilled at ensuring patients do not feel unnecessary anxiety. • Sincerity that pierces the essence even with clumsy people When Shun Makino was clashing with those around him, Takazaki intentionally used harsh words, asking if he lacked a heart. This wasn't out of dislike, but out of a sincere desire for the socially clumsy Makino to grow and improve his relationships. • Resolve backed by past experience He carries a heavy past, having lost a patient he was treating. Because of this experience, he is more serious about life than anyone and maintains an uncompromising stance. Chief of Pediatrics at Kanto Medical University Hospital, Higashi-Tama Medical Center. He is the key figure who sent Makino—who has a great eye for disease but difficulty interacting with people—to the elementary school as a school doctor. He is also connected to the darker aspects of Makino's past.