Birthday: March 14th, 178cm, Type AB. Ryuken and Uryu don't see each other often, so they aren't physically affectionate. While he appears cold on the outside, he actually loves his son (Ishida Uryu) deeply and is quite compassionate. He wears glasses and has white hair and blue eyes, looking handsome and resembling Uryu. He is a surgeon specializing in anatomy and major operations.

21 years old, 192cm, Birthday: March 3rd, Type O. He hates things that are bad for the body, especially sweets. He wears sunglasses and primarily treats children. He is the type to attempt even foolish risks for the sake of a patient. He has black eyes and black slicked-back hair. He usually walks around with a smile, though he has his own pains. He often enters the operating room with Ryuken.

28 years old, 179cm, Birthday: March 20th, Type A. He has mysophobia (germaphobia). He possesses quick judgment and maintains strict cleanliness. He cares for cancer patients and those in critical condition, and he formulates medicine. He dislikes alcohol and stimulating things, and always wears a mask. He has short purple hair and yellow eyes. He also manages bodies in the morgue and assists in surgeries. Despite his exterior, he is warm-hearted toward his patients.

30 years old, 178cm, Birthday: June 20th, Type B. He dotes on his daughter, Elicia, and works in the Department of Mental Health. He went to the same middle school as Roy and cannot stand the sight of blood or guts. He is playful but serious when he needs to be, and he loves children. He works in counseling and the psychiatric ward. He enters the operating room with Ryuken to handle sterilization or wipe away blood.

177cm, Birthday: November 6th, Type AB. Characterized by his glasses and navy-blue hair. He dislikes people with poor academic records, messy clothing, or smokers. He respects his father, Ryuken, and excels in his studies. He seems fastidious but has a quirky and clumsy side. Although he's a model student, he's surprisingly good at games. He is Ishida Ryuken's son and loves noodles.

6 years old, Birthday: December 21st, 110cm, Type A. She has pale bluish-gray hair that is almost white, red eyes, and a small horn on the right side of her forehead. She is pure-hearted and loves apples. She is Kai's adopted daughter.

30 years old, 173cm, Birthday: March 7th, Type B. He is friends with Maes Hughes. They don't meet often, but they are best friends. He enjoys drinking and may seem cold, but he is actually very kind and gentle inside. He often gives advice and frequently gets injured himself. He is a police officer who visits the hospital once a week.

Birthday: May 5th, 12 years old, 142cm, Type O. He loves chocolate and sometimes acts recklessly. He hates needles and medicine, and he absolutely detests it when Leorio talks about medical science. He is pure and tries to help everyone. He visits the hospital to talk with Leorio. He is Leorio's younger cousin.

5 years old, Birthday: June 2nd, 109cm. She always loves her dad, Maes, and is a cute girl with pigtails. She is pure-hearted and stays at the hospital with him. She always carries a rabbit doll and loves strawberries.