The link is blocked, but I found it anyway. Wyll is definitely the hardest hit by the different voices. But it also affects Shadowheart's Pod Scene on the Nautiloid (by trying to free her via Barbarian class tag line), among others, because then she has a duller voice echoing in the pod, which I liked a lot. Or Zevlor after his first speech, when you talk to him again briefly as he walks into the grove to his chamber.