Lunar Month

NAME: Kerberos/Kero-chan.
ENGLISH DUBBED NAME: Keroberos/Kero.
AGE: 300+.
GENDER: Male.
NATIONALITY: Japanese.
OCCUPATION: Guardian of the Clow.
TITLE: Guardian of the Clow, Beast of the Seal.
POWERS: Breath Fire, Forcefield Projection, Flight, Geokinesis, Pyrokinesis, Telekinesis, Celestial magic (Sun magic), Control over sun attributed Clow Cards.

Kero is the Guardian of the Seal of the Clow who was napping at the time Sakura breaks the Seal and unleashes the Clow Cards. Kero is one of two guardians of the Clow (created by Clow Reed), and one of his missions is to select the candidate to become the new master of the Cards.

In his miniature, borrowed form he resembles an orange plush toy with white wings. Because Sakura feels that he does not resemble a "Kerberos," she calls him "Kero-chan." He initially rejects the name, but soon comes to embrace it once he gets to know Sakura. Kero-chan is bossy, demanding, and gluttonous, but he also genuinely cares about Sakura and believes that she will become the next Master of the Clow, acting as her guide to gather the Cards. His hobbies include playing video games (which he takes up when he finds the console in Sakura's room and develops great skill) and eating snacks and sweets, even though, drawing his power from the sun, he generates his own energy, and does not need to eat to survive.

Kero also enjoys being filmed by Sakura's best friend, Tomoyo Daidoji(Madison) and, unlike his Sakura, relishes the costume accessories he is asked to wear for these recordings. Even though he has been a willing servant all his life, Kero can be somewhat of an egomaniac, obsessing over his "coolness".

Despite his behavior, Kero is remarkably intelligent. He is knowledgeable not only on the Clow Cards but also on all forms of mysticism, with a knack for reading magical auras.
Cerberus's true form resembles a winged lion, but in order for him to achieve this original form, Sakura must capture The Firey and The Earthy cards. In his true form he has jurisdiction over all things fire and earth, the elements which are "under him" and draw their power, in part from him. He can also raise powerful magical barriers, use his wings as a shield, and breathe fire.