Red Hood

Bio
Jason was the 2nd Robin, recruited after Dick quit when Bruce caught him trying to pull off the genius plan of stealing some wheels. The only small problem with his plan, he was trying to steal the wheels of the Batmobile. While he was Robin he was scoping out a location, and Joker grabbed him. Joker beat on him with a crowbar, then blew him up, killing him. He was brought back by a pit, did some training for a few years, and returned to Gotham for revenge.

History
He has faced off against Dick and Babs as well as Bruce, and all 3 have realized who he is. He also had a run-in with Harley, during this he brutally murdered her guys, and then before he could decide what to do with her he heard sirens so he left her for the GCPD.