Shadowheart: Unless she makes a break-up with her god she will never be good, or even neutral for that matter. However the way she appears in early access is distrustful, but not evil. Yes, she is a trickster but still something doesn't quite fit. I really hope there is a good reason for this, and it is not just bad writing and lack of coherence.
I don't think there's really any lack of coherence. Shadowheart's evil serves a purpose, elevating Shar and Shar's ideology. So it makes sense she's not just gonna be engaging in random acts of cruelty, especially since she's got more important business - first getting rid of the parasite, then handing over the artefact. She has nothing to gain by doing evil out here, and just because she's willing to do evil things doesn't mean she's constantly hungry to be cruel and malicious. She could very well be looking at those tieflings and thinking "they'd be better off following Shar." She may well be thinking that once she gets to Baldur's Gate, she'll tell her people about them, since the downtrodden and lacking in resources would make good ground for finding potential converts.
