Well, on the one hand carrying two passengers instead of one ups the mana cost by more than carrying one passenger instead of zero, but on the other hand, they can just get places in ways other than teleporting. Possibly with occasional exceptions. 

"That should be fine, thanks." 

Irabeth looks at her consideringly for a moment. Given what she claimed her "theme" was, she's unlikely to cause a certain sort of problem...and separating him from the rest of the men could be a good thing...

"Staunton!" she calls. 

A grumpy dwarf emerges. "Yes?"

"I'd like you to escort these two ladies," she nods to Lucy and Ember, "as they...go about their business." 

Translation: do fucking weird magic things. 

He nods shortly. He doesn't know if being around two random strangers will be better than being around a large group of other crusaders, because there are fewer of them, or worse, because the lack of witnesses will encourage them to greater cruelty, but either way, it's not like he has the privilege of turning down an assignment. 

"Thank you!" This guy has more than nothing wrong with him but less than Rapier Girl, and less...insidious. Besides that she can't say, she's not great at interpreting non-magical things wrong with people yet, but either way, best practice is to be polite. 

He nods stiffly.

(This isn’t surprising or anything; plenty of people are civil in front of Irabeth.)

Okay then! Time to head out and see if they can corner a Dretch alone or something. 

There are a handful of Abrikandilus loitering outside, does that count?

Absolutely not!!! Tentacle the bastards and run away before they can get free.

—Or, well, fly away. Whatever, that’s fine, it doesn’t take mana, and she can fly low enough that she doesn’t get separated from Ember and Staunton.

Come to think of it, her magical girl outfit including high heels might have had something to do with her tripping and falling into the crevasse earlier.

She’s tempted to just fly up high enough to locate somewhere with one or a few dretches hanging around, but that’s just asking to encounter a Vrock or a succubus or something, so, no.

They can run into a small handful of Dretches a short while later.

Perfect. Okay, so they need to separate one of them from the others, or just Slumber all of them so the other two can’t interfere while she’s working on one—

The trio of dretches notices the trio of crusaders before Lucy can even finish the thought, let alone decide on a strategy. Stinking Cloud.

—Ough. Okay, well, that’s unfortunate, but doesn’t negate the previous sentiment. She will just sort of land and dry-retch while Staunton and Ember handle the situation for a bit.

This is a kind of situation that Staunton has a lot of experience handling! Actually, the hardest part is that he’s supposed to leave one of the three Dretches alive. He doesn’t exactly approve of doing weird experiments on demons—it seems like the kind of thing that is just obviously a bad idea—but his judgment is demonstrably bad and Irabeth told him to go along with what Lucy and Ember wanted, so.

…Oh. Well.

She isn’t going to scold Staunton for killing the other two Dretches. She would have preferred to avoid that, but “don’t kill the demons that are invading your city” is just obviously not an instruction you can give someone, and she hadn’t even tried.

Realistically…even if she can un-demon a Dretch, she’s not going to be able to do so at a scale that will save every one of them in Kenabres, let alone the rest of the demons. If she tries to inhibit the Crusaders from killing demons without having an immediate, strategically and not just morally better, way of neutralizing them, then that ends with worse outcomes overall than if she hadn’t been involved at all, which. She can absolutely do better than.

So…

…She’s not into necromancy, obviously. But—she’s pretty sure, that getting stronger as a magical girl, doesn’t work the same way as getting stronger normally does, on Golarion. The overwhelming majority of people she’s been are from not-Golarion places, and some of them are almond certainly from outside Pharasma’s Creation, and there are lots and lots of ways she can recall to get stronger without probabilistically annihilating yourself. She has no reason to think she now works like a Golarionite and an intuition that she doesn’t.

And even Golarion has dragons, who just get stronger with age.

Which means that eventually, if she isn’t unlucky enough, she will have phenomenal cosmic power. And…and this is the part where her not being into necromancy comes into it…Geb and Arazni form a proof of concept, that a dead Outsider is not actually categorically irretrievable.

And that means that the correct thing to do is to chill the fuck out about demons dying, for now, and also as she kneels over the Slumbered survivor, to touch the ground and send tentacles to pick up the corpses of the other two and hammerspace them.

Staunton notices that, obviously, but given that he already knew she was doing mad science to demons he does not particularly draw conclusions from it.

Okay.

So.

It is, in fact, fairly easy to keep the Dretch asleep, once she’s got her magical “fingers” tangled up in it. A Dretch’s desire for rest is one of the most non-horrible things about it, so it’s easy to lean into.

Pulling out the demonic essence is…harder.

People are complicated, and she doesn’t want to unmake this one, but the corruption of the Abyss has sunk in very deeply. Trying to simply regress them back to when they were a relatively resurrectible grub would be relatively simple, but that kind of calling-forth-data-from-the-past is a little mana intensive for what she’s trying to do.

So she has to carefully, carefully comb through the metaphorical strands of this creature’s being, identifying the exact ways in which they’ve been warped by the Abyss, and ever so delicately teasing out the corruption while leaving the formerly-corrupted structures intact.

She would also like to leave them corporeal, if possible. She doesn’t understand all the cosmological bullshit involved, but when a person hangs around on Golarion past the death of their body, they are an incorporeal ghost. But when they move on and become a petitioner, they’re solid again. Lucy isn’t categorically opposed to creating a new body for this entity and reinstating them as a mortal, but again that would take a lot of mana that she doesn’t have going spare right now, even if she were capable of doing it, which she thinks she might not be, yet.

But the delicate combing is working. It’s slow going—she’s vaguely aware that Staunton has had to commit some more violence in the background while she’s been working—but it’s working.

And eventually she sits back, and stretches, and yawns. “Done.”

…The creature in front of her, still curled up asleep, sure doesn’t look like a Dretch.

On reflection, Staunton thinks he wouldn’t have been surprised just by the intended mad science doing something, but—it, uh, seems? To have worked??? He certainly isn’t detecting evil off of…that…anymore…

His estimate of Lucy’s power level creeps upwards significantly. Also, what the fuck.

“Oh, that’s so cute!”

“I don’t think this form is permanent, I don’t exactly—”

“—What the fuck!”

“Are you okay?”