Artist's description:

> twilight and fluttershy: prisoners of tirek, the most mistreated of the 6. twilight has absolutely no exposure to anybody but cell guards and tirek. fluttershy is still with discord, but also used as a way to keep him in line.
rarity and pinkie: prisoners of cozy. rarity helps cozy keep plans, thoughts, etc. organized. rarity is often always with cozy. pinkie, on the other hand, is used for entertainment. being the youngest of the three (this is roughly 10 years in the future — cozy's about 20 or so), cozy still has a rather young heart and enjoys her fair share of entertainment. most of it consists of humiliating pinkie.
rainbow and aj: prisoners of chrysalis. rainbow is used for guard training, where aj (her family, and other families) is still a farmer.