My Little Pony: Friendship is Magic - A Pony's Destiny (Season 3, Volume 3)

What is a pony's destiny? Is Applejack's destiny-to-protect Spike? Will Fluttershy become friends with Discord reform the mischievous spirit? Rarity is so proper surely she will become a lady-in-waiting to a beautiful princess like Cadence. And what about Twilight-Sparkle? Is she destined to learn all the spells in Equestria?