The first thing Kybele will notice when she wakes up is almost certainly the enormous pain in her chest. It's not that there's a shortage of things to notice, in the middle of a busy market square mid festival, but that's the kind of thing that really tends to grab the attention. Wherever she fell asleep, she certainly isn't there now.
The living cultists she doesn't care to drag; she starts rigging up ways to attach them to the sides of horses in their cocoons. Any of them have anything to say for themselves?
They're not being very cooperative. Most of them are terrified, but a good third are a mix of angry and defiant. A couple of them have knives inside the cocoons and are trying to use that to cut their way loose.
Well if they're going to be conveniently making cocoon holes exactly where their knives happen to be she can yoink the knives.
Nope! They're going into Garms's stash to be issued to crusaders! Any other stuff they want her to take now?
...One of them has a second knife but he's going to save it and hope she gets distracted before she gets around to killing the prisoners.
She has no magical ability to detect secret knives.
Home they go, dragging the horse corpses and toting the cultists in their cocoons.
The trip back to camp is slower, between the people who have to now share horses and all the extra loot they're carrying and the horse corpses and the cocooned cultists, but they can still make good time and are not ambushed en route.
If the cultist waits until they're riding off to cut his way out, and tries to pry apart the papers when feasible instead of slicing them, can he slip out without her noticing?
Hahaha no she can feel it as soon as the paper shifts. She'll hop off her horse to go divest him of his knife.
Fuck. He tries harder on principle, but it's not like he was able to escape before he got himself trapped in a cocoon of paper that she controls with her mind. She can get another, smaller knife, and this time disarm him for good.
And nobody else manages to make a credible attempt at escape, unless you could struggling to no avail with their bare hands as credible. The lookouts at camp fetch a paladin to check them over for infiltrators, and then once they're cleared her mission is officially successful.
Is she going to object to them taking the prisoners off her hands? They'll try to get any relevant information out first, of course, but being a demon cultist is a capital offense in Mendev even if they didn't participate in sacking a city.
She understands that, she just wanted to make sure they could sift through them for anyone who hasn't in fact committed a capital crime, like if they were kidnapped or something.
Interviewing cultists is already thankless work if they don't have to sift through the inevitable lies that they were only there because a succubus mind controlled them into it, but luckily the crusade has an entire separate group whose job that is and they can make it their problem instead. They can head off to do that without complaint.