Chrysalis has been subjected to everypony Twilight Sparkle knows in order to get her to change her ways and adopt Friendship. But the former Queen of the Changelings has proven indifferent or worse to their best efforts. So Twilight brings in Dr. Jordan Peterson.
Set after Ending of the End. Sex and death tags only for references.
Disclaimer: I am not a clinical psychologist. I have no ties to Jordan Peterson, and make no claims that this is how he would treat/rehabilitate an individual. Also, be warned, the bonus chapter contains memes. Enjoy, for what it’s worth.