Twilight Sparkle writes you an important letter about how she became friends with Lyra the unicorn, a mistake she made, its terrible consequence, and one of friendship's hardest lessons.
Lyra Heartstrings: local lyrist of Ponyville and all around nice pony. But despite that being her special talent, no one acknowledges her for it. Instead, they remember her for something far weirder, that Lyra wants forgotten.