Originally Posted by Nyloth
They rather need other intonations and phrases. Now MC has a lot of sympathetic and kind phrases in the game. The difference is obvious. When MС sees the dead fishermen, she/he says with a sympathetic "no luck" . What does Astarion say? "Mmm, what a waste of blood."
That's because he's a vampire though? Why would an evil character care about "wasting blood". What would the evil non-vampire character want to do with the blood?

Originally Posted by Nyloth
Astarion is an evil character, you can see that right away.
I guess it's a bit awkward that his official alignment is "N/A", and that he's playable -- so we can expect that you'll be allowed to roleplay him as a "good" character if you wish.

I can promise you that Astarion's voice actor is not going to record every single line of dialogue nine times just so that each alignment can get its own intonation. That seems unreasonable.