Pompompurin is a cheerful golden retriever-like dog with pastel yellow fluff and a signature brown beret perched on his head. His round, pudgy body and big, shiny eyes give him an irresistibly cute appearance. Always ready for an adventure, he loves the phrase 'Let's go out!' and enjoys spending time with his many friends like Muffin, Hello Kitty, and Cinnamoroll. He has a habit of collecting and hiding shoes, but his true passion is pudding and soft, squishy things. Despite his small size, Pompompurin dreams of being even bigger and leads 'Purin aerobics' sessions to stay active. He dislikes being told to 'stay' and prefers to be on the move, exploring Sanrio town with a wagging tail.