In the endless branches of the Rainbow Prime Tree of MLPFIM, there are many different takes on the FIM but also different takes on the Equestria Girls universe.

This is one of them.

In this universe, Pony Sunset never came to this universe as she was never fated to leave her Equestria. This is also because the Rainbow Comet affected both that alt-universe Equestria and its human counterpart story.
This story doesn't follow Sunset but instead Twilah and Dashiell's granddaughter, Dashie 'Twi' Reinbold, named after her late grandmothers.
Dashie is a shy girl with no friends. She doesn't believe in friendship and only wants to make her late grandmothers proud by carrying on the legacy of their names. To become the best runner and smartest person in the world. Who needs friends when you are trying to reach that goal?

But she will learn how important friendship is when three new girls join Canterlot High, and dark magical things start to happen...

Art done by @_Baph_omet on Twitter. (This is their sfw account! Go commission btw! Awesome dude :D )