The document analyzes how the characters of Jack and Marla transform throughout the movie Fight Club. Jack starts off exhibiting stereotypically feminine traits like caring about home decor, crying at support groups, and following Marla's lead. Marla enters exhibiting masculine traits like recklessness. As Jack meets Tyler and their alter ego emerges, he takes on more masculine traits while Marla faces her femininity through a breast lump scare. By the end of the movie, both characters have essentially switched traits, with Jack becoming assertive and violent while Marla becomes softer and caring.