Dennis Iliadis wanted to add more characterization and depth to the character of Mari and revealed that the writers decided to make her a competitive swimmer which attributes to her character development and survival later on in the film .
Dennis Iliadis is the director of the 2009 film .
Dennis Iliadis , the director of the 2009 film , wanted to add more characterization and depth to the character of Mari and revealed that the writers decided to make her a competitive swimmer which attributes to her character development and survival later on in the film .