There is a good video here analyzing the origin companion alignments:
Please note that alignment is not programmed into BG3 so the analysis is just projecting the actions of the origin characters into the old alignment DnD no longer present in 5e.
In short:
Laezel is considered lawful evil based on her actions, but also her Githyanki belief.
Astarionis considered chaotic evil. He's a vampire spawn and only concerned about his own interests.
Shadowheart is considered neutral (evil). She is a follower of Shar who is a neutral evil goddess. However, Shadowheart by her actions is more neutral than evil. Therefore (evil) in parenthesis . It's possible she can be turned more towards good if you get in good favor with her so she won't approve of evil actions.
Wyll is harder to assess, but according to the analysis he's chaotic neutral, but capable of doing good things too. Let's see how he will behave in the final version. His story is completely rewritten. It could be Larian will focus more on his good side. So maybe he's converging towards chaotic good or neutral good. Time will tell.
Gale is also hard to assess, but according to the analysis he's neutral good. He usually agrees with selecting good actions. However, it might be he's just agreeing with the PC just to get in his good favor so he can get access to the artifacts he needs. His might have been more neutral (maybe even towards evil) before and trying to make amends after getting hit by the curse.
Karlach we don't know much about, but she is considered to be good. She also seems to follow orders so lawful good is a good bet.
Minsc is considered to be neutral good to chaotic good. Let's see how he behaves in BG3.
Jaheira is considered to be true neutral being a fighter / druid. However, she might behave differently in BG3 compared to BG1+2. She seems more like a leader now. Minthara is most likely lawful evil. She is definitely evil. She is a leader following orders from the necromancer so she is most likely lawful.
Alignment was never removed in D&D, and still hasnt been in 5E to my knowledge. Its still all over the place (thankfully). youll notice this alot as a DM. Certain magic items have alignment requirements. All creatures have alignments. And Alignment is still an optional rule for your player character in PHB. Alignment comes to the fore in Devils vs Demons vs Celestials vs Fey basically, and for all the deities, of which there are a ton i Forgotten realms.
Last edited by Odieman; 19/07/2305:45 PM.
"They say he who smelt it dealt it." Sooo technically... this burnt corpse is your fault officer."