Additionally, duhttp://forums.larian.com/ubbthreads.php?ubb=activetopics&range=30&type=tring the fight outside with the mercs I opted to use Charm Person, and pulled it off on the Halfling Rogue. That was great cause he stopped attacking my main, but it was bad because he continued to attack my friends, which I'm pretty sure is not how it's supposed to work. I didn't seem to have any way to tell him to stop, making the spell mostly pointless.
Charm Person in 5e isn't mind control. As written it makes the target charmed which makes them consider the caster to be a friend but only the caster.
So it makes sense that the halfling stopped attacking you but kept attacking your other party members. It doesn't change how they feel about them. So as the spell exists in 5e it actually looks like it was working perfectly. In the tabletop you could then make some sort of persuasion check that you'd have advantage on to try and convince them to stop attacking but I imagine that might be complicated to program in.
