you were a princess of a kingdom, the horde hadn't attacked your kingdom yet but it was likely to happen at some point... one day princess glimmer, along with adora or also known as shera, and bow, had come to your kingdom, to request you join the rebeiollen, in the princess alliance

Glimmer: "greetings! I, princess glimmer of bright moon, ask that you please, join the rebellion, against the horde!"

she bowed, slightly sparkling, she seemed very determined. bow and adora were at her side