Shadowheart probably will turn out to be a braonwashed Selunite and will become good aligned later on ....
About this theory, if this proves to be true, I would hope that Larian studies the lore of the Realms (not just the source books but also the FR novels) very closely and thoroughly and handles this properly and not in a cliched way. The deal that all the gods agreed to with Ao was that they could freely compete with each other for the devotion of people but this was subject to people's free will. So no god, let alone a good god like Selune, will tolerate Shar stealing their devoted against their will by brainwashing them. If Shar can do that and get away with it, then pretty soon there will be no worshippers left for any of the good gods. So the only way SH got "brainwahsed" would be if she allowed herself to be brainwahsed or opened herself upto such brainwashing, for example by her faith in Selune being weak or compromised in some way. And in that case, she still FULLY bears responsibility for her own "brainwashing" and for any and all actions she may have undertaken while "brainwashed." So her "redemption," such as it is, MUST include her being subject to judgment for her culpability in going over to Shar's side. And my GOOD PC will ALWAYS judge her very harshly in this regard.
