But anyway, while the companions are all pretty cool, the one that struck me the most is Lae'zel. She sounds legitimately different from a human, which is the same reason why i like the goblins.
It might be post-processing. There are VST plugins, Dehumanizer for example, that allow to introduce distortions into the recorded voice, to make it sound "inhuman".
Not sure if they used it for Lae'zel; the voice isn't very far off. So, yes, it might be the actress.