I generally deal with the hunter amicably and it doesn't come to a fight, though the times when it does, SwD considers you the killer, even if you didn't participate directly; how do you see that one?
If you choose to kill Gandrel and use the speak with dead spell, you get dialogue choices where you find new information about why he wanted to capture Astarion. You learn that it's not Cazador but someone known as Maiden Fel. The reason as to why she wants Astarion alive and unharmed remains to be seen. Some players speculate that is could have something to do with the scar that Astarion has on his back. What's the reason behind that we still don't know. Even Astarion wants to find out what was done to him.
