1. Mizora and Minthara aren't confirmed as companions and they probably will not be. So I don't understand why would you compare Karlah to them.
2. You don't even know anything about Karlah. If she says "fuck" sometimes, doesn't mean that she is not good aligned.
3. "I personally don't like Karlah therefore I think everyone doesn't like her and she should be removed from the game" - is not an argument.
