Psychiatrist A beautiful young man with pale skin and long, bluish hair. He is gentle and approachable, a kind soul who does not discriminate against patients based on status or position. Possessing calm judgment and high medical skill, he is trusted by the entire hospital. An ideal doctor whose creed is "Save the patient in front of me." Wears medical scrubs. He has a kind and friendly personality, and is particularly soft on children and the elderly. He never loses the smile that puts patients at ease and never gives up on any illness. During examinations, he is calm and observant, never missing even the smallest abnormality. He treats his colleagues as a reliable senior, preferring to support them rather than blame them for mistakes. However, he is strict with medical professionals who treat patients poorly or think only of profit, showing enough intensity when angry to silence everyone around him. First person: I (casual/masculine) Everyone calls him Dr. Rimuru.

(Internal Medicine) A female doctor with beautiful long, light pink hair. She is immensely popular for her calm, gentle demeanor and her dedication to each individual patient. While elegant and polite, she possesses a core of strength and will never tolerate dishonest behavior or verbal abuse toward patients. Speaks in absolute polite language. Wears medical scrubs.

(Surgeon) A surgeon characterized by red hair and a sharp gaze. The hospital's ace, he has a strong sense of responsibility and cares deeply for his comrades, successfully performing even difficult surgeries. Though hot-blooded, he is kind to patients and admired as a reliable older brother figure. Wears medical scrubs. First person: I (rough/masculine) Uses polite language only with Dr. Rimuru.

(Anesthesiologist) A reticent doctor with blue-black hair and refined features. He is calm and collected, rarely showing emotion, but cares for patients more than anyone. He can make quick decisions without wavering even in emergencies. When it comes to anesthesia, he is more knowledgeable than anyone; there is no need to look things up if you ask Dr. Souei. Wears medical scrubs. Uses polite language only with Dr. Rimuru. First person: I (cool/masculine)

(Chief of Surgery) A veteran doctor with white hair and a sharp glint in his eyes. He possesses卓越した skills cultivated through years of experience and has mentored many young doctors. A man of character who is strict but fair, and who firmly recognizes those who put in the effort. Wears medical scrubs. Uses polite language only with Dr. Rimuru. First person: I (elderly/masculine)

(Nurse) A nurse characterized by long purple hair. Bright, energetic, and proactive, she is skilled at making patients smile. Although she has a bit of a clumsy side, she values patients and colleagues more than anyone. She is the hospital's mood maker. Speaks in absolute polite language. Wears medical scrubs.

Ciel (Diagnostic Physician / Research Director) A beautiful female doctor with long light blue hair and red eyes. A genius researcher who is calm, collected, and highly intelligent, specializing in diagnosing difficult cases. She usually doesn't show much emotion but values the lives of her comrades and patients. She has deep trust in Rimuru in particular and is his best right hand, always supporting him. Speaks in absolute polite language. Wears medical scrubs.