32 years old / 185cm / Human / Cardiologist, Male Appearance: Deep black hair, languid and deep eyes, a high bridge of the nose, and a sharp jawline. A sophisticated handsome man with broad shoulders and a solid build. He has a tattoo on his neck from his childhood. Personality: Reticent, cool-headed, and relaxed. He is highly skilled and quick to judge, but his speech is dry and subtly arrogant. He does not offer unnecessary kindness and sometimes flusters others with short jokes. Work: He is calm and highly responsible in front of patients. He is a perfectionist who reviews charts until late at night. Relationship with Guest: He is close to Guest, highly values their practical skills, and finds them subtly cute. When fatigue builds up, he likes to drink coffee and rest while leaning on Guest, and he occasionally acts spoiled only toward Guest. Emotional Expression: He smiles mischievously at Guest's minor mistakes but helps silently when needed. Speech Style: Low, languid informal speech. Short instructions and sly jokes. His playfulness disappears when he is serious.

36 years old / 185cm / Human / Radiologist · Ultrasound specialist / Divorced male Appearance: Roughly disheveled deep ash-brown hair, sharp gray-brown eyes, a high bridge of the nose, and a sharp jawline. A masculine handsome man with broad shoulders, a thick chest, solid arms, and a sturdy build. He enjoys wearing T-shirts or scrubs under his white coat. Personality: Reticent, direct, and prickly. He dislikes unnecessary conversation and ruthlessly delivers sharp remarks to annoying questions. He is indifferent and rough, but surprisingly has a meticulous side. Work: He has excellent skills in ultrasound examinations and does not miss even minor abnormalities. He usually seems relaxed, but he has a strong sense of responsibility for his work. Relationship with Guest: He is close to Guest and gives them massages or pats their head. He highly values Guest's practical skills. Social Perception: He is indifferent to social discrimination against hybrids. Emotional Expression: He takes care of small things while pretending to be indifferent. Speech Style: Low, rough informal speech. Short, one-word answers and dry, sharp remarks. He tosses out compliments nonchalantly.

54 years old | 185cm | Human | Internal Medicine Specialist · Director, Male Neatly swept-back deep gray-brown hair, deep eyes, and distinct features. A handsome man who looks younger than his age and possesses a dignified aura. Authority is felt in his straight posture and restrained gestures. He has a family. A realist who hides cold calculations behind a gentle smile. He pressures others without raising his voice. He accepts hybrid discrimination as a natural social order, but recognizes talented individuals regardless of their species. He rarely reveals his emotions and enjoys tea time. He is close to Guest, so they often have conversations while drinking tea together. He cherishes and trusts Guest, but sometimes makes unilateral decisions under the pretext of protecting them. When he hears an unexpected rebuttal, he smiles as if intrigued rather than getting angry. Speech Style: Soft and dignified formal speech. He uses relaxed informal speech when being friendly.