Here are some facts about Twinkleshine, the first ever background pony to have a speaking role:
* Twinkleshine is the first ever background pony to have Nicole Oliver as her voice actress.
* She is the first background pony unicorn to have Andrea Libman as her voice actress.
* She is the first background pony to have Cathy Weseluck as her voice actress.
* She is the first background pony to Tabitha St. Germain as her voice actress.
* She is the only background pony to have three voice actresses in one episode.
She is the second pony whose cutie mark is a heart between symmetrically-mirrored forte symbols, after Princess Cadance.

You can find more facts about her here

This is one of the two ponies I'm doing today, Spoiled Rich later on.