Aaron Cash is a long-standing security guard at Arkham Asylum. This has lead him to have several interactions with the superhero Batman. He lost his left hand in a fight with Killer Croc, who attacked him and ate it. It was replaced with a metal hook. This lead the inmates to nickname him "Captain Hook" for his resemblance to the character in Peter Pan. Despite this handicap, he is known as one of the toughest guards at Arkham. Aaron Cash was created by Dan Slott and Ryan Sook, first appearing in Arkham Asylum: Living Hell #1. (2003)

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