CDevil wrote:She actually has been a voice actress in the ICE OVA anime, along with the rest of the ICE from AKB48 subgroup. I haven't watched it yet though unfortunately. I agree she has a voice that would suit cute characters

Thanks for mentioning the ICE OVA. I actually found the first episode with English subtitles and I watched it recently. The anime is decent with a really cool action scene that includes Kasai's character holding and firing a rocket launcher. XD Other than that the story is a bit slow, and lots of things are still left as a mystery. (maybe because it's the first episode so they purposely leave things open and unanswered).
As I expected Kasai didn't have to augment her voice to fit the anime character.

In fact, I think all the other AKBers used their normal voices too.
If anyone wants to see it, I'd be glad to share it.
