I never got used to Mao(Vic)'s voice. It was very sharp, the complete opposite of his japanese soft voice. The difference was so big that I think it made his personality sound different :( .
Same with Geoffrey/Jiiya, however unlike Mao, the english voice actually favored him. It made him sound more trustworthy and reliable.
His cranky high-pitched Japanese voice was so out of place that made him look suspicious right from the beginning.

Val's voice sounds classy and mature, I like it.