Barbara Gordon Hardy was an ex-thief who was determined to be a S.H.I.E.L.D. agent. Using her natural athletic skills to fight crime, she created a superheroic identity, the Black Bat. She quickly proved her worth to S.H.I.E.L.D. and Barbara was invited to join the secret organization.
Over a short period of time, Black Bat and fellow agent Bruce became more than teammates, and soon fell in love. Bruce was planning on marrying her, when they were sent on a mission to stop a doomsday weapon. She and Bruce managed to destroy the weapon, but seemingly lost Bruce in an explosion. It is unknown if Bruce escaped, or if Black Bat managed to save the man she loved.
Black Bat had the ability to affect probability fields. It entails that under stress she is subconsciously able to cause anyone in her immediate vicinity that she perceives as a threat to be susceptible to freak accidents, like guns jamming and exploding, or tripping on objects, etc. Black Bat has reflexes, agility, and stamina of an Olympic level acrobat. She is physically very strong and athletic and has great physical endurance. She is an excellent street fighter capable of taking on several armed assailants and incapacitating them without being injured herself.