Araj Oblodra. (The Drow blood-alchemist from Moonrise, but she gets really fun when you meet up again in the lower city) Not only is she crazy, but I find her attractive also. Wish she were a romancable campmember.
She is pretty - that is my favourite elven face from the CC - , but she is one sick lady. Found her botched experiments in teh cellar the last playthrough (she died in Moonrise in teh first one)
"We are all stories in the end. Just make it a good one."