Just an aside - in my case anyway, romancing Shadowheart was pointless. A caveat - hetero cis male here - so there's that. A kiss, some regrets the next day - meh.
According to datamining discoveries Shadowheart has a canon love interest who is marked as "Daisy", but as this is a default string used to refer to the ideal lover character the player makes also it might not mean that she is a lesbian. Interestingly Larian has also marked Shadowheart's love interested as unavailable to EA players, forever.
