Batman an occasional ally and romantic interest), the Penguin, Ra's al Ghul, Two-Face, the Riddler, the Scarecrow, Mr. Freeze, Poison Ivy, Harley Quinn, Bane, Clayface, and Killer Croc among others. Many of Batman's adversaries are often psychiatric patients at Arkham Asylum. Batman's butler, Alfred Pennyworth, first appeared in "Batman" #16 (1943). He serves as Bruce Wayne's loyal father figure and is one of the few persons to know his secret identity. Alfred raised Bruce after his parents' death and knows him on a very personal level. He is sometimes portrayed as a sidekick to Batman and the only other resident of
Batman: Return of the Caped Crusaders and Robin break in, they are defeated by the criminals and trapped on a frozen food tray heading towards a large oven. Catwoman uses her Batnip on Batman, but he is supposedly unaffected by it. The two escape the trap after the villains leave the factory. Back at stately Wayne Manor, Bruce starts showing signs of aggression after Aunt Harriet nearly discovers the Batcave. He blames Alfred for the incident and fires him, leaving the butler to wander on the streets homeless. After days of not finding Joker, Penguin, Riddler and Catwoman, Batman figures out that the four crooks are