These aren't fully in the game yet- they are marked as Impossible- but they are voiced and in the text files as well, so likely will be fully implemented in the next patch! I am excited about this- before, the companions seemed oddly mirthful/apathetic about Astarion's fate, instead of nice like (most) of them have been rewritten to be here. (Minsc, however, keeps the same response as before, "We will find you, Astarion! AND BOO WILL BRING A SUNFLOWER!" Which is fine because his previous response was perfection!) This is very welcome!
Lae'zel: Call him man or call him monster, but Astarion was a force against the Grand Design. He deserves to bask in the sun, not to hide in darkness.
Shadowheart: Poor Astarion. How he loved the sun- if only the feeling was mutual. I hope that isn't the last we see of him.
Wyll: Astarion! Gods, what a horror, to feel the sun on your skin for so long, only to be forced back into the shadows.
Gale: Astarion! Cured of one affliction, only to be reclaimed by another. The sun is no longer a friend to him, but we must be- he'll need more solace than shadows can provide.
Halsin: A cruel blow- Astarion loved feeling the caress of the sun... only now it gouges him with its claws. Perhaps we shall meet again, beneath a shield of darkness.
Jaheira: Be well, Astarion. Hide while you must- but do not think your city is done with you just yet.
Minthara: Astarion is cursed to flee the sun as I am cursed to walk in it. Do not belittle him with pity- he is a survivor, and will thrive upon what bounty the darkness provides. There is life in him yet.
Karlach: Astarion. Burnt by the sun again. Godsdamn, that's fucking cruel.