Persona 5 / MLP Crossover.
(Now with a Tvtropes Page!🥳)

Her Majesty Princess Celestia, the Prideful self-styled Goddess of the Sun and mother of all sins who crossed the thin line between righteousness and self-righteousness.

You are the ruler who hides her hunger for power behind lies and facetious benevolence while condemning an entire race to extinction.

We have decided to make you confess all your crimes with your own mouth.

We will take your distorted desires without fail.

From,

The Phantom Thieves of Hearts.

When a huge chunk of Equestria appeared floating above Japan surrounded by a bright golden barrier, everybody panicked until Celestia appeared before them with promises of friendship and peace…

But then things changed.

The Barrier soon started growing, engulfing everything on its path and killing every human it touched while leaving behind everything else, albeit “Purified”.

Even Celestia changed, and what once were promises of camaraderie and brotherhood, became veiled threats:

“The Barrier cannot be stopped, we are sorry.”

“We cannot control it, but you can still be saved! Convert! Become a pony! Become one of us and the Barrier and the Magic of Equestria will no longer hurt you!”

But while some believed the words of this gentle mare, others felt mistrust and fought back, turning the offer of Conversion into an obligation:

Convert or Die.

All while still begging Humans to accept, even when Conversion showed dire downsides to the humans undergoing it.

But there is no longer time, if the humans can’t decide, the Ponies will decide for them: Conversion! Conversion at all cost!

And from the shadows of despair, a last spark of hope emerged!

A group of young forgotten heroes, called back in action by the Staff of the Velvet Room to enact the Greatest theft in history!

It’s time for the Phantom Thieves to return, and steal the purest hearts of them all before those too fall into Distortion!

This is the story of a brony, who inserted into Equestria.
But instead of a pony, he became the enemy of Celestia.

Would he decide to do what’s right, to love and tolerate
Or would his evil changeling nature make it hard to integrate

Then there is the question of the duty that is his natural birthright
Tasked by the changeling Queen, he was to murder Princess Twilight

So, here’s my attempt at a SI with a bit of a twist that others have done before. Go to Equestria, end up on the wrong side of the tracks, and have to deal with it. Enjoy!

Art provided by SoukiTsubasa

Twilight Sparkle broke time when she got her cutie mark. Now Twilight and Sparkle are sisters from another time. Twilight is hailed as the potentially greatest light magician of all time, and already has a reputation as a hero by the time she goes to Ponyville. This isn't her story, not primarily.

Sparkle is an orphan - her dark magic killed her parents. She lives with her brother in Canterlot's industrial sector because they can't afford anything better. She can't leave either. She's a natural dark mage; while Sparkle won't go mad like Sombra, her reputation is hardly any better. Worse, the law doesn't see her as a good pony.

The fact that the dead don't stay dead around her, or that Thorn - Spike's double - is an undead, soul-eating abomination, are other matters altogether.

(Also has some Slice-of-Life, but fimfiction tags won't let me put it with Adventure.)

Has an ask blog to go with it: Ask Sparkle and Thorn.
Also has a TvTropes page: Split Second Tropes.

Featured on EQD.

Cover art by Swirling Line.