Miki Murakoshi stands as a vibrant counterpoint to her extremely reticent best friend, Mayu Morita. Highly talkative, Miki openly shares her thoughts and frequently dominates conversations within their friend group. Her social nature includes a pattern of developing frequent crushes on boys, though these romantic interests typically fade quickly, leaving her without a boyfriend. This tendency to speak freely sometimes leads to awkward moments, like when she unwittingly joins jokes about broken home magazines, unaware such topics might upset Hana Matsuzaka, who experiences family discord firsthand. Miki's lively, unfiltered conversational style often fuels misunderstandings. Her ordinary interactions with Mayu and other friends are sometimes misinterpreted through a lens of yuri romance scenarios by male classmates like Kōichi Ōno and Ryūta Kokubo, creating comedic situations. As a core member of the circle alongside Chihiro Miura, Hana Matsuzaka, and Ritsuki Yamamoto, Miki's energetic presence and willingness to speak freely highlight the group dynamics and provide a constant contrast to Mayu's silence.