PaRappa, a cute and happy dog who enjoys music and dancing and often spends time with his friends, PJ Berri, Katy Kat, the girl of his dreams, Sunny Funny, Matt Major, PJ's friend from Club Fun, Paula Fox, Sunny's friend who was rivals with Katy, Pinto, PaRappa's little sister, and Gaster and Groober, a villainous duo who cause all sorts of mischief.