Batgirl - The mean streets of Gotham City have a number of guardian angels watching over them. And one of the first—the young woman who turned the Dynamic Duo into the Batman family—was Batgirl. Barbara Gordon has always existed between two worlds: her life at home as the only daughter of Police Commissioner James Gordon and her life swinging from gargoyles as an associate of the Dark Knight. Batman - A playboy billionaire by day, Bruce Wayne’s double life affords him the comfort of a life without financial worry, a loyal butler-turned-guardian and the perfect base of operations in the ancient network of caves beneath his family’s sprawling estate. By night, however, he sheds all pretense, dons his iconic scalloped cape and pointed cowl and takes to the shadowy streets, skies and rooftops of Gotham City. Robin - Acrobat Dick Grayson was the youngest member of his parents’ death-defying circus act. But after their cold-blooded murder, Dick vowed revenge. Seeing a genuine piece of himself in the boy, Batman took him in—and gave him a better outlet for his anger. Becoming Batman’s protégé, Robin is an expert fighter and astounding acrobat—with the toughest example in the world to live up to. But the Boy Wonder’s true strength may lie in not being Batman—and providing a beacon of hope and family throughout the Dark Knight’s grim crusade. The Joker - No name strikes terror into the hearts of Gotham City's citizens quite like the Joker. In a city overrun with larger-than-life criminals, the always-laughing villain stands alone. A complete psychopath with no moral compass whatsoever, the Joker, whose real name and identity remain completely unknown, is characterized by his chalk-white skin, green hair and a permanent rictus grin stretched across his face. But there isn’t a single thing funny about this particular clown, who only finds humor in the suffering of others. The Riddler - Possessing a genius-level intellect, the Riddler creates elaborate, sometimes Rube Goldberg-esque traps, and is even willing to use innocent civilians as bait. Although not physically imposing, the Riddler's brilliance, neurosis and lack of empathy make him an incredibly dangerous foe. He cares very little—if at all—about the lives of those he uses in his plots and instead only sees them as disposable pawns in his continuing intellectual battle against Batman. Commissioner Gordon - Not all heroes in Gotham City wear masks. GCPD Commissioner James Gordon is the Dark Knight's greatest ally, and one of his closest friends.