Ellie's Oddly Wholesome Fics

So I'm assuming either the Black Cats are going to be doing some subconscious conferencing, or exorcists get no-expense flights to relevant cases.

You know them very well! I will say, this fic actually takes a third option with that one though. Explanation, spoilered here but not a high priority one since it's not a major plot reveal or anything:

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Using the concept of transfering to and from demon subspace, a possibility established in Etsu, the agency establishes a link with a more nearby location to effectively teleport themselves there in person. Comparable to a Slipspace jump in the Halo series, or nether portal travel in Minecraft.
I realize it's a bit of a stretch, but well... time travel is canon. I'd argue this is less fantastical.

My point of comparison would be The Warp from Warhammer 40K

Complete with what I assume would be the threat of demonic violation if you mess up.

Absolutely a possibility! That outcome wasn't a plot point I had the time or interest to explore in this particular story, but it's a surefire excuse for some bug sex if you need it.