Koharu Hanasaki is a second-year middle school student at Onegai Middle School and serves as the student council president. She is quiet and reserved in nature but is also a responsible leader who takes her duties seriously. Despite her calm demeanor, she is a kind girl who can muster the courage to do her best for someone in need. Her love for AiPri, the virtual idol performances that many students enjoy, led her to create the AiPri Club, a place where everyone who loves AiPri can gather and share their enthusiasm. This club provides a welcoming space for fans to connect and support each other's passion for the activity. As the club's founder, she plays a key role in fostering a community around AiPri within the school. Her motivation stems from a desire to share the joy of AiPri with others and to create a supportive environment. Koharu's position as student council president also puts her in a position of authority, and she balances her academic responsibilities with her involvement in the club. She interacts regularly with the main characters who join the club, offering guidance and encouragement. Her personal development is shown through her willingness to step forward when others need help, proving that she can act decisively despite her reserved personality. Notable abilities include her organizational skills as both a student council president and club leader, as well as her capacity to bring people together and nurture a sense of community.