@Jigsy: Actually, at the end of Chapter 2, she calls Yami "Yami-oneechan" which would mean, Yami is the older "sister", while Mea is the younger sister.
PicoHan said: Nana's hair is longer than I thought.
She looks much hotter with it left loose like that I wish she would keep it like that all the time, it looks so soft and silky I want to run my hands through it.