Cerberus was created by Clow Reed, a powerful magician. He controls the power of the sun and is the guardian of the Clow Book which Sakura had accidentally opened. Even in his true form, Cerberus is still the same "greedy" person we know… He still likes sweets and you can say that he still fools around. But in some situations, of course he has to get serious. Even in some circumstances, he and Syaoran still can’t agree on almost everything. He hates Syaoran for trying to steal away the Clow Cards from Sakura during his first few weeks in Tomoeda. He loves being video tapped by Tomoyo who is usually always there every battle if possible.