Buster Moon is a fictional character from the animated film series Sing. He is a young, optimistic koala who owns a struggling theater. Buster is passionate about the performing arts and dreams of reviving his theater by hosting a singing competition to attract talent and audiences. Throughout the films, Buster is portrayed as determined and resourceful, often facing challenges with a positive attitude. He is known for his love of music and his ability to inspire others, including a diverse group of contestants, such as Rosita, Johnny, and Ash, who each have their own unique stories and aspirations.