An older, mellower Scootaloo relocates to the Crystal Empire, tasked with tutoring a jumpy junior Princess. She's either the worst pony for the job or the ONLY pony for the job. There is no in-between.
Routine day with a dirt cheap brush, then a week goes by and it goes untouched. Then two, then three, then a month, and the rest of your life you beat yourself up. - Aesop Rock, "Rings"