Everypony in Ponyville knows Ditzy Doo, the loveable, wall-eyed mailmare with the sunny, optimistic disposition. OK, so she's a little slow and a little disaster-prone sometimes, but give her a muffin and a letter to deliver, and she's as happy as can be, right?

Or maybe you shouldn't judge a book by its cover. Because, as Twilight Sparkle finds out, Ponyville really doesn't know Ditzy Doo at all.