The Phoenix of Konoha

What would a daughter of the famous Flash and Habenaro of Konoha be like? Would it be possible for twins to grow up without one another yet impossibly alike? Why does this woman have Itachi's necklace wound around her wrist? Can Naruto be reunited with his sister or will she turn away from him in fear? Can Sasuke unite the siblings or will he be sidetracked by her blinding spirit?