Barbara Gordon/Batgirl
Barbara Gordon is the daughter of police commissioner, Jim Gordon. Barbara Gordon has a genius level intellect and has been trained in martial arts for self-defense. Barbara never desired to be a hero. She crafted her costume to attend a police ball with her father. On her way to the ball though, she stopped a mugging of Bruce Wayne. This would ignite her desire to become a crimefighter. Initially she and Batman would work independently of each other. She would eventually earn the trust of Batman and Robin and they would invite her to join them.
Years later, the Joker would show up to her apartment and shoot her through the abdomen and possibly sexually assault her. This would leave her confined to a wheelchair for some time. Although she was able to recover, during her stint in the wheelchair she would assist the Bat Family as Oracle utilizing her skills with technology.
Batgirl has since returned to the field and is adjusting to the physical demands of being Batgirl again.