Koboshi Uematsu  

, 植松 小星

The character Koboshi is portrayed as a confident person who has strong feelings for Kotarou. However, she finds it difficult to express these emotions due to embarrassment. Her daily routine revolves around her interactions with Kotarou, from greeting him in the morning to talking to him throughout the day. This sense of normalcy was disrupted when Misha arrived and began encroaching on Koboshis territory. Despite this, Koboshi continues to wear cat-shaped ears every day, even though they are not real or attached to her head. She can become easily agitated and overprotective, which causes her to be constantly irritated by Mishas behavior and attachment to "her Kotarou-chan".