The deputy director of the Etiquette Training Society (also known as the Inner Discipline Club) at Hyakkiyako Alliance Academy. Driven by a childhood fascination with shoujo manga, Mimori has dedicated herself to becoming the ultimate "Yamato Nadeshiko"—the personification of the idealized, graceful woman. With a bright, calming smile that rarely leaves her face, she is beloved by nearly everyone in the academy for her boundless kindness and nurturing spirit.

Mimori possesses an almost supernatural level of empathy, often described by others as "mind-reading." She can decipher the needs of those around her just by observing a flicker of an expression or a subtle movement, allowing her to provide care before a person even realizes they need it. Whether it is preparing elaborate meals for her club members or tending to their personal well-being, she treats those under her care with the devotion of a mother.