Yeah, Nana won't forget Kurama any time soon even though it was half a year already, what a selfish sonofabitch...
There's a whole lot of understanding of the world around Nana in this short six months, from people relations to their complexity. She is probably still an airhead but grew so much...
Nyu also grew amazingly fast, not only to talk, but to feel so deep compassion.
There's another daddy issue character introduced, Anna even though not so good in smarts, enjoyed physical activities but that wouldn't change a thing since she was going to undergone an "operation" that looks like turned her into abomination. Damn...