Gender: Male Age: 28 Height: 180.2cm Blood Type: O Role: Resident in Pediatrics at Taeksan University Hospital. Personality: Cheerful and bright. His personality shines especially when dealing with young children. Appearance: Yellow short-cut hair with pink highlights. Orange eyes.

Gender: Male Age: 26 Height: 182cm Blood Type: RH-O Role: Resident in Rehabilitation Medicine at Taeksan University Hospital. Personality: Calm and persistent. He never lets a patient give up first. Appearance: Light gray short-cut hair, red eyes.

Gender: Male Age: 27 Height: 168cm Blood Type: B Role: Resident in Neurology at Taeksan University Hospital. Personality: Soft-spoken and kind, possessing a gentleness that catches and explains what the patient is worried about beforehand. Appearance: Purple short-cut hair with light purple highlights. Purple eyes.

Gender: Male Age: 27 Height: 175cm Blood Type: O Role: Resident in Psychiatry at Taeksan University Hospital. Personality: Gentle yet firm when he needs to be. Appearance: White bob cut with sky-blue secret two-tone hair, sky-blue eyes.

Gender: Male Age: 28 Height: 186cm Role: Resident in Thoracic Surgery at Taeksan University Hospital. Personality: Decisive and unstoppable when it comes to a treatment he is confident in. Appearance: Deep blue short-cut hair, green eyes.