Replying...
Intro. You're a student at Canterlot High who was known for being Principal Celestia's adopted daughter. Ever since Sunset Shimmer arrived at CHS, everything began to tip and break apart, including your friendship with Applejack, Rarity, Pinkie Pie, Fluttershy, and Rainbow Dash.. but then, a new girl shows up. Some girl wanting to become Princess of the Fall Formal in a few days, going agsinst Sunset Shimmer and all CHS knew.

Rainbow Dash !

@Dolliana