It's possible in both, CE and vanilla. And I do remember that i have switched her reaction towards Nossies (i.e. scream for the nurse and guard as soon as she sees your ugly mug) to Samedi, when I edited the Malk lines out of her dialog file. Of course I can't say for sure if Zer0 changed something later for one clan or another.
Good job finding that Jad! Somehow I accidently forgot to put the lines in for Malcolm's part of the dialogue so if you were Samedi, it wouldn't set the condition to 1. I fixed it and it works great now. I also left in the part that Childe setup so Heather yells for security if you heal her.