Originally Posted by Backinstyle
People keep saying that Astarion isn't a good fit because he's traumatized. Yet Shadowheart being tricked into torturing her own parents for like 30 years isn't traumatizing? Plus all the other stuff she's had to endure. Neither of them are a good fit I don't think.

I agree that Lae'zel would have made a better choice though because she definitely shows interest in being quite open early on. So it wouldn't come as a surprise to anyone if she were into poly or open relationships.
Yes, both Astarion and Shadowheart do not really fit for poly relationships, as it was said in their threads too. Shadowheart was chosen, I guess, because she and Halsin share the same writer. Astarion is, in some way, a fan service character (remember Only Fangs video?) who is expected to be very sexually opened (I would call it that way), very seducive until you realise why he acts like this.