You can kill them, and you should, in principle, to build up your troops for the battle with Beleth, since he is so strong. The consequences won't be that serious, so feel free to capture everything.
OK, it's a shame I didn't know that earlier - otherwise I would have eliminated them a long time ago (especially the runner - he caused me so much trouble, and he could have killed the machinist with his very first move after the ritual).
It's a pity that I won't be able to return to the game until next weekend.
