It's hard when you're alone. It's harder when you're alone and constantly picked on. Scootaloo's lost all faith in ponykind. A dark and troubled past drives her to the most extreme of measures.
The heat death of the universe is inevitable, and Twilight's lived to see it. Nothing can stop the crawl of entropy, but maybe, just maybe, there's time for one last adventure.
Autumn Blaze is tired of ponies and creatures thinking that she and the kirins are monsters. Losing her temper, Autumn needs her friends' help to calm her back down.
Night Glider didn't want anything to do with her destiny or her cutie mark. In an attempt to escape from it, she goes north to find what she really wants.