Hinata. He's just….. meh. I can't really find anything that stands out about Hisame, either. My feelings towards them might change once I actually play the game, though.
I initially hated Luna/Severa, but it seems she's better than she was in Awakening and has actually matured a bit. I'm still annoyed though by the constant "she's got an inferiority complex" excuse, character development is a very wonderful thing.