Kaoru Seta is a fictional character from the multimedia project 'BanG Dream!' She is a high school student and a member of the band 'Hello, Happy World!' where she plays the guitar. Known for her princely demeanor and dramatic flair, Kaoru often quotes lines from literature and plays, which makes her popular among her peers. Despite her theatrical personality, she is genuinely kind-hearted and cares deeply for her friends. Her role in the series is to bring joy and happiness to those around her, aligning with the band's cheerful and upbeat theme.