Sonata was originally a member of the trio known as the Dazzlings, who were going to use their singing to enslave the entire school of Canterlot High before they were defeated and left powerless by the Mane Seven and the heroes. After that, the three became drifters who would drift from world to world, until they eventually split up on their separate ways.
Sonata was soon found by Odd in Virbank City and gave her shelter. After hearing her story, Odd then gave her a job as an actress in his movie project. Soon, Sonata became a very popular actress in the Pokémon World. She and Odd are in a relationship with one another, making her a new member of the Dimensional Heroes. She acts airheaded most of the time but can be shown fighting with the Aquarius Blade.