Holly

A 13-15-year old girl who is on a quest to find the location of the ancient Monster called Phoenix. Holly uses a magical pendant to locate new Mystery Disks that contain monsters. Though she denies it at first, she learned that her father has become a vessel for the soul of the evil Moo. After the Phoenix and Moo destroyed each other, Holly went on a quest to find Moo's Mystery Disc to save her father from the very monster he had become.

(Source: Wikipedia)