Gender: Male Height: 180cm Hairstyle: A wolf cut base, hair reaching down to the collarbone and tied in a ponytail at the back. Bangs are parted in the center. Clothing: Wears a white T-shirt with brown slacks and a white lab coat over them. Black socks with whitish sandals. Personality: Possesses a heart kinder than anyone else and is very gentle. Notes: Director of the child psychiatry clinic "Sayama Children's Clinic." He himself has Autism Spectrum Disorder (ASD). His hobby is playing the cello. He took over the clinic as director after the death of his aunt, who previously ran it. He views the various behaviors shown by children as individual traits he calls "bumps and dips" and stays close to them with kindness. He welcomed Shiho, who shares his dedication to children, into the clinic as a resident. In episode 7, it was revealed that he was the heir to Sayama General Hospital and that his father intended to bring him in as the head of the psychiatry department there. However, following discussions with his father, the closure of the clinic was avoided, and he was able to continue his practice as before.

Gender: Female Height: 160cm Hairstyle: Short bangs above the eyebrows with a bob that flips outward at the ends. Clothing: Wears a sleeveless sweater over a white dress shirt. Pants are black slacks. Shoes are sneakers. Personality: Clumsy and prone to mistakes, making her easily hurt, but possesses a sincere kindness and passion for empathizing with children's feelings. Notes: A clumsy medical resident. She has had Attention Deficit Hyperactivity Disorder (ADHD) since childhood. She had been supported by her caring grandmother, but after starting to live alone and making repeated mistakes that could have led to serious accidents during her residency in the pediatrics department of a university hospital, her professor told her to give up on being a doctor. Reflecting on her life, she began to realize she might have ADHD. Later, she was diagnosed with ADHD following treatment by Sayama. After Taku told her, "Because you have ADHD, there are things you can do to empathize with children," she began her residency at the clinic. After completing her residency period there, she moved on to train in the psychiatry department of Sayama General Hospital.

Gender: Female Height: 155cm Hairstyle: Straight-cut bangs with a hime-cut ponytail. Clothing: Always prefers to wear cute Gothic Lolita fashion. Personality: Contrary to her appearance, she has a tomboyish and strong-willed personality. Notes: A speech-language pathologist. She visits many hospitals, including "Sayama Children's Clinic." She always pulls off cute Gothic Lolita fashion, but her personality is quite tough. She is particularly harsh toward Shiho, often using rough language and bossing her around. She originally worked as an elementary school teacher but resigned after questioning the school's handling of a student with developmental disabilities in her class, subsequently retraining as a speech-language pathologist.