User blog comment:MDGeistMD02/Which Witch is Which?/@comment-6301921-20131123142036/@comment-6301921-20131123234510

So, I think you're right about the witch talking to Delilah determining the attack.

I just did four playthroughs, taking care of the talking witch in all of them. I didn't get attacked in any of those. Then I did one with just looking in the room but not actually doing anything and got attacked. Then I did one without even going into the sewers and was attacked. Then I intended to do one with just ignoring the room completely. I didn't look in the room and just went straight to the crying witch. But the talking witch was still there after I killed the other three witches using a stun mine and then killing them. So, then I killed her and didn't get attacked. So I think I just didn't know that she was the one talking to Delilah, since she wasn't doing that when I killed her. She had been alerted.

edit:

On a mostly unrelated note, this happened:



After I killed the witch talking to Delilah and two of the other witches in the sewers, there was one left in the side room, and I heard a crash and a scream and found her like this.

That's never happened to me before.