Barbara became Oracle, a powerful computer hacker and information broker, after the Joker shot her and paralyzed her waist-down in Alan Moore's graphic novel The Killing Joke. Four women have taken the name Batgirl since then, before Barbara reclaimed the title in the 2011 reboot: Helena Bertinelli (Huntress), Cassandra Cain (currently Black Bat), Stephanie Brown (former Spoiler and Robin), and Charlotte Gage-Radcliffe (Misfit; albeit clandestinely). In this identity, she lead the Birds of Prey, which also included Black Canary. She developed a romantic relationship with Dick Grayson, then going by Nightwing, which led to a short-lived engagement.
Following the recent reboot of the DCU, the new 52 version of Barbara has regained the use of her legs three years after being crippled by the Joker and has retaken the Batgirl identity.
Young Justice marks Barbara's fifth animated appearance. She has previously appeared in The Adventures of Batman, the DC Animated Universe, The Batman and Batman: Brave and the Bold. Barbara has also appeared in two live-action TV-shows: the Adam West Batman series that originally introduced her, and the short-lived Birds of Prey series (where she appeared as both Batgirl and Oracle).