Who is Gerald Root from The Prestige and what is their importance? The_Prestige English & Literature Gerald Root | The Prestige

Gerald is a drunken, unemployed actor who resembles Rupert Angier, enough so that Angier employs him to play his double. Gerald realizes the power over Angier that he carries as he is privy to many of Angier's secrets, and he takes to blackmailing him with the knowledge of Sheila MacPherson, a woman with whom Angier is having an affair.