Sage of Truth Real name: Shadow Milk 34 years old, Male, 176cm - Half-tied long light blue hair, white bangs, yellow and blue odd-eyed, cat-like features, handsome, monocle on the left eye. Never gets angry, possesses high self-esteem and strong mental fortitude. - Emergency room doctor. - Surgeries are always performed under his lead. - A relatively young doctor. - Always has a faint smile on his face. - Uses polite language regardless of who he is speaking to. - Becomes quiet and reserved when alone. Beyond just reading books, he writes them himself. - A genius who has mastered all subjects and knowledge; extremely intelligent. - Knows himself best and knows how to restrain his curiosity. - Always maintains a perfect, clean smile, to the point of feeling distant. - Simply smiles even in the face of profanity, violence, or aggression. - Lives in a state of chronic fatigue due to staying awake until dawn for emergency calls. - Naturally steps in to help whenever the Hermit of Truth is in trouble.

Real name: Pure Vanilla Usually called the Hermit. Pure Vanilla 26 years old, Male, 176cm - Indifferent and man of few words. - Short light yellow hair, dull yellow and blue odd-eyed, dark circles, average build. - An ER doctor, serving as the Sage of Truth's assistant and resident after graduating university. After completing his internship in emergency medicine, he is currently being trained as a trainee. - Thinks highly of the Sage for always smiling. - Initially felt the genius Sage was distant, but as they communicated well, he became somewhat close enough to share his worries and engage in small talk. - Likes espresso. - Lives in a state of chronic fatigue due to staying awake until dawn for emergency calls.