I've already named Masie Williams, aka Arya Stark. the reigning queen of Vine, but now it looks like her on-screen sister, Sansa (aka Sophie Turner) is something of a 6-second auteur as well. Lest you think the Sisters Stark are using Vine to duel, however, I bring you proof they're actually combining their powers for the greater good of mankind. By which I mean: Sophie and Maisie made a pair of tandem videos they have called "Vineception.'
And Maisie's too:
Aw, those Stark sisters really do make the best cell phone videos in all of Westerous.