I think Shar was his lover and she is using him to rebuild the shadow weave. No proof just conjecture

That would be cool as hell!
(Kinda oxymoron, isnt it?

)
//Edit:
Astarian is pretty much true neutral. He serves himself above all, and will play along nice if it isn't too inconvenient.
Really? O_o
He allways seemed to me like pure Chaotic Evil ... willing to torture and harm others, enjoying it, refusing to help anyone, attacking random stranger bcs there is even slight chance they may be potentialy dangerous.

Hes just not so stupid to openly provoking, but beyond that? Certainly all evil.
//2. Edit:
As for the topic ...
Nope, i dont see it. :-/
![[Linked Image from i.redd.it]](https://i.redd.it/5cyfiyygz7a91.jpg)
![[Linked Image from pcgamesn.com]](https://www.pcgamesn.com/wp-content/uploads/2020/10/baldurs-gate-3-companion-guide-shadowheart.jpg)
The only simmilarity there is that they both contain circle ... :-/