In which some reincarnated humans-turned-villains (and human-reincarnated-Celestia) do Trick-or-Treating in another Equestria

What if four siblings and a horse were isekai'd to the show? What if it wasn't the first time for them?

The first episode is starting! With a human turned Celestia, how will she help unlike the canon? She joins the first fight!

Human-turned-Celestia and a human-turned-OC have been in equestria for hundreds of years. They have been following the canon script- wait- LUNA IS CELESTIA'S WHAT IN THIS AU!?

After wedding blues for Twilight and Pinkie. TwiPie story.