Minthara is definitely not a fully developed party member. Her character is pulled in two different directions, almost certainly like two very different people wrote her. I'd like to reflect more on this before giving my take, but my initial impression is her character was given no clear direction on who she is or what she wants. In the game, she exists as a strong drow female, but when dominated, rescued, and subservient to a dominant male, her character collapses into nonsense. She will approve of the MC acting in terms of gathering power unto himself and disapprove of the MC empowering others. But she'll disapprove of your character killing for killing's sake and such. My issue is her character appears schizophrenic in terms of real gameplay. Of course, this may be my own perspective, but you save her literal mind from oblivion. Your character is her savior. To me, as long as your character demonstrates strength, competence, or confidence, she should be on board in every sense. Otherwise, she faces death.