Dinah Drake

Dinah Drake (b. 1977), otherwise known by her vigilante persona Black Canary, is one of the first three vigilantes to patrol Gotham, the others being Bruce Wayne/Batman and Selina Kyle/Catwoman. She is the daughter of Janet Drake and the mother of twins Tim Drake and Laurel Drake (b. July 19th 2001).
At the age of 16, Dinah was involved in a particle accelerator accident at STAR Labs, giving her the ability of sonic screams. When her fiancé and the father of her children was killed in November of 2002, she decided to become the vigilante Black Canary. She was quickly approached by Batman and Catwoman, who took her under their wing, so to speak. She is known by Bruce for her reluctance to involve him or anyone else related to her work as a vigilante in her personal life.