Ok, Nanaki is (or was) the protector of Cosmo Canyon. (At least his tribe or species was.) He's supposed to be kinda fierce. And like someone said, we haven't seen Nanaki in anything other than a fight scene. We haven't seen him in a calm situation. He might look a little different in a non-combat scene. I think that he might have a very deep voice, but not a raspy or growly voice. (Just my thought anways.)