The Dino Rangers fought her before taking on Ruby Dragon.
Defeated by the Abaranger until the spirit of her true self re-merges with her, turning her back to her true form: the baby daughter of Mahoro and Asuka.
Defeated in comic world, then killed in the real world.
As a member of the comic book world, her actions were ultimately controlled by Carson Brady and Elsa was able to influence his writings through a psychic pen. However, Fridgia was never directly possessed by Mesogog.