This story is a sequel to Tales Of The Canterlot Deportation Agency: Soul Survivor
Out of all the entities in Equestria, human and pony, Joanna is the only one who has been Saved. Long before finding herself in a realm of evil temptations and demonic powers, she heard the Word, and so her soul alone is safe. All of those around her will find their deaths lead to nothing more than eternal torture, and Joanna is perfectly content to tell them all of the details. She doesn't understand why anypony has a problem with this, much less how she's become the most hated resident in New Cynosure. But that doesn't really matter, not when her soul is Saved.
And it's not as if she knows that everything else about her is broken.
(Part of the Canterlot Deportation Agency series, which has its own TVTropes page. Now with author Patreon and Ko-Fi pages.)
Cover art from Distorted Harmony. No, really.