If DOS2 is any indication, they will either at worst:
-Follow a character arc which reflects your own alignment. If you are good, all characters will become good.
At best:
-Have unique arcs with unique alignments, based on specific events and decisions you make.
If my EA experience is any indication, they will most definitely not puppy dog follow you on your moral path. Laezel barely acknowledges Tav's existence in one of my playthroughs.
I would say, that you get a pretty good idea of who each of them are by their interactions with you and the things they approve of. I doubt you are going to get Laezel to hold your hand and walk through the flower garden. You may be able to get her to realize that her queen isn't all she is cracked up to be, and maybe help her forge her own path rather than be tied down to the authoritarian society she was born into. I don't think you will ever be able to convince her to pet scratch though.
