The Best Day
Epilogue
Dear Princess Celestia,
Today I learned that your friends are more than just the ponies you play with. They are more than just the ponies you hang out with. They are family. They are the family that you chose, and the family that choses you.
Thank you again for sending me to Ponyville, because otherwise I never would have met part of my family.
Your Faithful Student,
Twilight Sparkle