Nolan Cassandra Cain

Cassandra Cain is the daughter of David Cain who was a member of the League of Shadows until he decided to leave the league for a life of crime. He taught his daughter how to deal with physical pain by beating and shooting her, as well as training her to be a deadly assassin. The two traveled to Gotham when events in the city caught the attention of Cain. Cassandra was told to stay back in assess the situation as Cain fought with the Batman, however the more she watched the fight the more she came to respect the Batman as while her father was fighting to kill him the Batman was fighting to stop him without causing his death. When Cain gained an advantage and was readying to shot Batman she intervened, disarming her father by breaking both of his arms. The Batman surprised that a young girl had been able to fight off a former member of the League of Shadows offered to take the girl in and to train under and fight for him. Cassie agreed, and took on the mantle of Batgirl that had been vacant since Barbara's accident.