Momiji mentors the protagonist, treating supernatural ailments rooted in emotional distress. He advocates pragmatic solutions and professional detachment, prioritizing efficiency over emotional engagement—a stark contrast to his former apprentice, who immersed themselves in patients’ personal lives.

Tall, dark-haired, and striking in appearance, Momiji wields sharp intellect and a talent for psychological manipulation, often using biting insults and merciless methods in training. His chronic inability to navigate spaces forces dependence on Pipopo, a supernatural guide of his own creation.

His history with his apprentice intertwines rigorous mentorship with sadistic undertones, leaving scars of fear and uneasy reverence. Momiji’s philosophy rejects emotional entanglement, focusing solely on curing ailments swiftly while sidestepping patients’ inner struggles—a cautionary stance shaped by his guarded worldview.