Batgirl (Gotham Knights)

"""“Batman gave his life to protect this city. I’m going to honor that sacrifice by keeping this city safe, no matter what.” -Batgirl to Teen Hulk."Barbara Gordon, also known as Batgirl, is a vigilante and protector of Gotham City.

Biography
Barbara Gordon's life as a vigilante started on a dark and stormy night. As she was sitting in her apartment, she got a knock on her door. Believing it to be her father, she answered it only to be shot by the Joker who promptly fled. She was very nearly paralyzed by the mad clown but she decided that she didn't want to be afraid anymore. She created a costume and went out to fight crime, eventually being caught by Batman. Seeing potential in her, he took her to the Batcave and began training her up.