I'm really enjoying Nanaki's personality so far. She's mean spirited and that's it. Doesn't even try to pretend otherwise like so many pretty girls often do in manga haha.
As for Kanede, I'm down for her despising Nanaki, but the story has been more tell than show on this regard. From how she behaves it looks like she feels a mix of respect and reverence towards Nanaki rather than distaste.
C'mon, I'm here for that nemesis turned lovers.