My ponysona in 2 different designs.
Further of her story, she was originally an ordinary unicorn from another world named Equusterra, the parallel world from us in real life but alt. universe of ponies without magic, and naturally born from fillies or colts with cutie mark as their destined dream skill or job.

Until... Pastel saw the portal with imagery of erasure, where she saw Sunny Starscout and her friends getting deleted by someone, or Pastel knew that it was the CEO who deleted them. One by one, Sunny's friends got turned into ashes of burnt tapes. Seeing this horror, Pastel has no regret in going to Sunny's world of Equestria that it already existed from Twilight Sparkle's to save it.

Pastel suddenly becomes an Alicorn, so strong enough to restore Sunny's world, and additionally created the once she created the OCS, Morphonia the Changeling, Ankh Firesky the Male Alicorn, Katrina the Munchkin Gypsy Sphinx, Larry Pawbot the Wolf Pony, Golible the Galloplin, Venus Everfly the Flutter Pony, Goraya the Umbrum Changeling, and her other OCs comes to life.

After Pastel restored the world of Equestria, the portal was nowhere to be found and now trapped inside as an unicorn who also existed, until she met Morphonia and her friends as the members of Outsiders and reveals her nature as a blessed Alicorn.

The CEO was based on Hasbro Executive, Chris Cocks, who made MLP G5 a very disappointing after A New Generation movie, and doesn't rely on the series itself. Pastel Textura was also based in my real life on being a writer and creator of the Outsiders and the other series.