Scars from the past

This is a Legend of Korra fan fiction. It's about little Asami and her sister Akane. They used to have a happy life, until their family was attacked by fire benders and their mother killed. When one of the fire benders is about to attack, Akane finds out she's a fire bender and is able to safe her and her sister. But since she never learned fire bending, she can't control the fire and her left hand gets burned. Her father refuses to call Akane his daughter, because fire benders were the ones who killed his wife. Akane grows up in an orphanage, and is an outsider because of her burnt hand and her caginess. When she is sixteen, she runs away and starts a new life in Republic City, not knowing, that her big sister Asami is just a few blocks away.