[Well, obviously they're conscious. So he draws a serrated knife from his wings, and tries to cut through the entangling vines.]

That's what it's been looking like. We found everyone's corpses, and the ones belonging to the part-demons are covered in Enochian runes that make a spell to repel souls. Considering only devils, angels, and people associated with them are likely to know how to write in Enochian...