My Hero Academia New Story

A hero from the age of seven, she was raised in a hero headquarters. As a child her parents were always coming home bloody, they both were pro duo heroes. As she grew older her brother got into hero training before her. As she grew into a young woman, she became numb to morals and the human mental limit. She had a quirk that was highly classified. No villain stood a chance with this young girl who is now fifteen. Her older brother has the same job as her. Their parents were killed or to the public, 'retired to America.' Her brother is two years older than her. His quirk is classified as well. However, to the public, he is a famous hero who discovers dead villains who have committed suicide during the hero battle. Also treating victims before the ambulance arrives. However, the young girl looks nothing like her older brother so when they work with each other in a mission they won't be connected.