Kakashi's Sister? A Wanted Criminal? What?

Breis Hatake (pronounced "Breeze") is the younger sister of Kakashi Hatake. After witnessing her father's death, and a few long months of sleepless nights and trauma, she leaves the Leaf village and her brother behind, hoping to end her pain. She's taken in by a man with the Sharringan. Sixteen years later, she's known as a famous Assassin, a killing machine belonging to the Akatsuki. Ruthless, merciless and cold blooded, Breis will kill without a second thought, living up to her nickname "Stone Heart" but when she's given the mission to take down her own brother, will she be able to? And she's seriously not falling for Itachi Uchiha, is she?