srsly she talks like she has biggest **** in tha hood
Lol, well everyone has their own unique voice in some form, this voice suits her considering that she kicks **bleep** with power and skill. Plus, I think people would get annoyed if she spoke like some kind of girly girl. I mean not every girl is in to fashion, pretty dresses or gossiping about men.
Some girls like action movies, sports and maybe stuff that we would normally like. Nariko isn't "manly", she's a woman who is most likely considered a tomboy.
I mean compare her to Fat Princess (who I would consider a girly girl), Nariko is more or less the direct opposite of her, so therefore I think it would show in her voice.