Her people ventured north long ago after the banishment of princess Luna, for they had feared that Celestia had done so in pursuit of gaining greater power as a single monarch. Over the next thousand years, the tails of a Princess gone mad with power became the folklore of the people, and as such the young were taught never to venture south of the snowy plains of YakYakistan.
Northsky lives a solitary life with her people as a hunter, and Stormtamer, which is their version of a weather pony. She never dreamed that she would see the southlands, until some odd Yak traders came through their town with odd stories of a place called Ponyville…
:D Thanks!