*SPOILERS - Please skip to the story link below if you do not wish to read the synopsis

*Also please note: This is a FlutterCord fanfiction, but it is NOT a "shipping".
It is about them seeing each other as FAMILY. Please keep that in mind
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Synopsis: This is a short story about my headcanon as to why Princess Celestia chose Fluttershy to befriend Discord and not somepony else. Considering Discord never had a true friend before and Fluttershy has never mentioned her family at all, both of them were lonely for companionship beyond the Power of Friendship.
Fluttershy filled the void of lonliness with her animal friends, not that the other 5 didn't matter, but Fluttershy wanted someone to love and take care of as her own family, in turn the countless animals.
Now that Discord is reformed and has Fluttershy to take care of him, both he and Flutters both got what they wanted.
Discord got a friend, and Fluttershy got someone to take care of as family.

This short story explains the dreams Fluttershy has with longing for that family connection and the unconditional love of caring for someone and having them love you back, and the realization that Discord was alone in this world and needed her just as much as she (didn't realize) she needed him.