Originally Posted by ahania
Quote
Astarion and Halsin polymance might have worked early in the game, when Astarion/Tav relationship is still developing, is sex oriented and he's unsure what he wants, but later on it feels very icky and precisely like a betrayal.

My only comment is that I don't think poly/Halsin would work well at any point with either Shadowheart, Astarion, or any other origin characters without some considerable rewrites to the main romance progressions.

Hence why I used the word 'might' have. What we have right now is tacked on and handled disrespectfully and repulsively.

Originally Posted by t1mekill3r
Originally Posted by Filia
the more popular ones, to be precise, like SH, Astarion

And that's the only reason why those two are fine with Halsin and Mizora.

This is the most logical explanation for why they were picked as poly-agreeable, even if it doesn't make sense considering their romance arcs.