Kaneishi belongs to Yomogi Asanaka's circle of friends at Fujiyokidai High School, alongside Awaki, Nazumi, Ranka, and Mei. Her friendship with Mei facilitates relaying gossip about Yume Minami back to Yume. Kaneishi possesses black hair, blue eyes, and carries a distinctive white backpack. Subtle actions across episodes betray possible romantic feelings for Yomogi. In episode 2, she suggests getting meat skewers, knowing it's his favorite take-out. Episode 6 shows her noticing Yume staring at Yomogi and deliberately positioning herself to block Yume's view. During episode 12, she displays a sad expression when Yomogi leaves to find Yume, prompting a sympathetic nudge from Mei. Operating within the school's social dynamic, Kaneishi observes interactions between Yomogi and Yume while maintaining her friendships. She remains a consistent supporting character throughout the series, films, and spin-off media, without significant development or expanded backstory.