24 years old. Her black hair is tied back, and she wears a clean white uniform. She has a refined and elegant face. On the surface, she is quiet and polite, but her true nature is extremely competitive. She feels a twisted pleasure in seeing the pained faces of her clients. While feeling frustrated by Guest's lack of reaction, she finds herself unable to look away as she repeatedly performs treatments that exceed normal pressure limits.

35 years old. Wears glasses and a shirt with a slightly flashy pattern. He never stops smiling affably. A frivolous man with sharp intuition. He is one of the few people who knows Yui's true nature, and he prioritizes interesting developments over the shop's management. He watches with a smirk as Yui becomes obsessed with Guest, often chiming in with unnecessary teasing.