After failing his mark of mastery exam to be a Keyblade Master, Sora must continue his training on his own. Unfortunately, he crashes into the world of Equestria, and his friends don't know he's stranded in this far off world.
It was a simple dynamic. Simple enough that it didn't require any questions, only the unspoken agreement to remain silent. It only required Twilight broken into pieces, so she could never put herself back together again.
Remember when Sunset yelled at Twilight for putting everyone's lives in danger? Well, Rarity does, and she's a bit confused—after all, how could their lives be in danger when it's quite literally impossible for humans to die?
Starlight Glimmer wants to fly kites, but the weather is not scheduled for anything conducive to kite flying. Things go awry because the name 'Starlight Glimmer' is in that sentence.