I think they hint at Kahga being evil. Shes the "serpent" druid and all. I mean when you first meet her shes torturing a child, so yea, not your typical druid for sure. I feel like shes the real evil path, like the "lawful evil" path if they were to actually get the paths right. Minthara is a psycho... Kahga has a Game of Thrones Cersei Lannister vibe... at little less smooth but about as coldhearted. and when you think about it, a serpent is cold blooded
But Kagha is not evil. She is
My problem with this is that she and the druids behave as though the Tieflings don't also want to leave.