Part of a series of companion fics to each of the "Fiendship is Magic" comics.
Fiendship is Magic #1 Fanfic (Sombra) : Sombra Omega
Fiendship is Magic #2 Fanfic (Tirek) : Madness for Power
Fiendship is Magic #4 Fanfic (Nightmare Moon) : For the Love of a Nightmare
Fiendship is Magic #5 Fanfic (Chrysalis) : The Need for Change
"It was, perhaps, his greatest failure ever." As a very young Starswirl the Bearded pens these final words in his journal, he finds himself alone in his study with the magic mirror now housing the banished Sirens. Starswirl knows that no one could blame him for ridding Equestria of three such relentless menaces...yet he blames himself just the same. He understands now that is a better kind of magic he must come to understand, especially if he wants to succeed at training his two young princess charges to lead Equestria with loyalty and generosity and laughter and honesty and kindness.
Meanwhile, in the realm of 'humans', the Sirens struggle with the changes their banishment has brought, but also vow to return to Equestria and rise again...however fearful each of them may truly be that they will never see home again.
Years later, an aged Starswirl realizes that he cannot end all of the pain the Sirens bring to others and themselves...and so he prepares a certain princess of the sun for the day when someone will come along who will perfect the study of the Magic of Friendship in ways he never could.
"Don't say goodbye. I promise everything will be all right. Don't leave me, I'm sorry, I'll fix this if it costs me my life. I'm going to make this right."
~Aviators, "Friendship"
Aviators Bandcamp