The winged daughters of Princess Cadance and Shining Armour, Flurry Heart and Skyla.
Skyla very often takes a flight around the kingdom to stretch her wings, and if she can Flurry will join her, it's here that they get to talk freely to each other without interruption, the two sisters are very close.

Here Flurry shares some of her recent worries with her level-headed little sister, though all Skyla can offer her is comforting words in turn, it's a rough time for Flurry currently.

This is before Flurry becomes overtaken by emotion and turns into Fury Heart . But she gets better.