Betty Kane was the Golden Age Batgirl. The character of Barbara Gordon was created to play Batgirl in the Batman TV show. Superpowered teen Charlie Gage-Radcliffe briefly donned the Batgirl costume after Barbara was injured, but soon changed her name to Misfit. Laurel Lance is the Black Canary.
The Joker possesses no superhuman abilities, instead using his expertise in chemical engineering to develop poisonous or lethal concoctions, and thematic weaponry, including razor-tipped playing cards, deadly joy buzzers, and acid-spraying lapel flowers.