lolnoThat's because it's an ENGLISH ACCENT.I'm not very far but there were times in the beginning when she's with Hope where she sounds like she speaks perfect english then a few seconds you can hear an accent. I just found it kinda funny.Pretty sure she always does... but do you have examples of when that happens?
Vanille and Fang are voiced by Australians. XD
It's probably just the fact that you're not used to the accent, Spartan. I wasn't at first, and noticed much the same thing, but as I got used to the way that Vanille and Fang speak... I noticed the accent all the time.