He likes to Roll with his Ball
The Prince (also known as the Dashing Prince, Prince of Ouji, or the Prince of All Cosmos) is the main character and silent protagonist of the Katamari Series and usually the first playable character. He is the son of the The King of All Cosmos and The Queen of All Cosmos, and the grandson of Papa. Throughout the games, the Prince is entrusted with the task of rolling a Katamari (or something similar), for the sake of filling requests or creating celestial bodies. In Katamari Damacy, the Prince was tasked with using Katamaris to create stars for the King after a drunken night of cosmic destruction. When the King realized what he had done, he unceremoniously sent the Prince to Earth, sent him a Katamari, and told him which stars to make. Despite being constantly told what to do, the Prince puts his all into everything he does and always does his best.