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. She was a major character in the Crossover DX dōjin, mainly as the romantic lead with original character Yusuke. She took a backseat role beyond that.

She was hurled into another dimension (the Tamers universe) by demon king Murakumo at the Kaizer's contest[1]; while writing her out of DX02, it allowed her to be the only previous character in the Tamers-dominated DX03. {Wikipedia}