Mei stands as Yume Minami's closest friend and key social conduit. She actively connects different social circles, specifically bridging Yume and Kaneishi, who moves within Yomogi Asanaka's group. This role enables Mei to relay gossip and social updates to Yume, facilitating interaction between otherwise separate friend clusters. Photography is an interest Mei enjoys. Her personality balances sociability and solitude; while she bonds with Yume over shared loner tendencies, Mei demonstrates comparatively stronger social aptitude. She possesses keen awareness of group dynamics, including Kaneishi's romantic interest in Yomogi. Mei's friendship uniquely exposes aspects of Yume's character hidden from others. Their interactions reveal Yume's fun-loving, dorky side beneath her usual stoicism. This relationship also contextualizes Yume's personal struggles, such as her compulsive lying and complex feelings surrounding her deceased sister. Indirectly, Mei's presence ties into broader familial issues affecting Yume, like her mother's involvement with a cult after the sister's death, contributing to the challenging home environment shaping Yume's behavior. Visually, Mei sports black hair typically in a single bun, yellow eyes, and distinctive red-framed glasses. Her standard attire consists of a white shirt, blue skirt, yellow necktie, and a grey hoodie.