Jason Todd

Jason Todd was a street orphan until he met Batman after he had saved him from The Joker. Jason was trained by Batman and later became the second Robin, but he was beaten and tortured by the Joker, who sent Batman a video of the event and lied by telling him that Jason was dead. Batman fell into a deep depression over Jason's "death". Years later, Jason returned, sought revenge against Batman, and utilized advanced technology and resources that he had acquired by pooled resources from his enemies. He was able to develop high-tech equipment & trained a battalion of soldiers. He even designed a high-tech "Batsuit" with capabilities as well as utilize lethal gadgetry and weapons during combat situations. Jason created the identity of the Arkham Knight, until his redemption and forgiveness at the hands of Batman. After he finally aided Batman against Scarecrow, Jason took up the title of the Red Hood, a name that was used by the Joker prior to his transformation.