They have comments if he does ascend, if he doesn't and during the moment, when he carves the runes.
I thought Ulma is pretty ok after ascension. They are monster hunters after all and you just created an uber-vampire after agreeing to work with them before. So from a narrative point of view, it's understandable that they are treated more as opponents than as potential allies if you go the ritual route.
In Rivington they are all pretty decent, as soon as they realised that Astarion had free will, they treated him like a person. Having had Wyll and Astarion on my team recently, I'd say they are more accepting & less judgemental than the monster hunter who is part of your group. Perception might vary but I thought the Gur are pretty well written overall and I do enjoy them as NPC, Gandrel most of all. He never dies except for science.
