Keroberos is the Guardian Beast of the Clow Cards. He is released when Sakura opened the Book of Clow and released the other cards. He is often a jokester, but he is a sincere teacher/mentor/friend. He absolutly, positivly loves sweets of all sorts...he just can't get enough of them. Throughout the series, he helps Sakura throughout her challenges and provides her with companionship.
