Kasumi Toyama is the energetic and optimistic protagonist of the anime series BanG Dream!. She is the lead vocalist and rhythm guitarist of the band Poppin'Party. Kasumi is known for her signature catchphrase 'Star Beat!' which reflects her goal of finding a star-like thrilling sensation through music. Her journey begins when she discovers a star-shaped guitar and decides to form a band, driven by her passion for making people smile through music. Kasumi's infectious enthusiasm and determination inspire her bandmates and those around her, making her a central and uplifting figure in the series.