In the novelization of the film, author David Morrell gives more insight to Co's character. She is far different in the book, however. She was said to be an economics major at the University of Saigon and learned very broken English there. Co is also fairly vulgar in the book, whereas in the movie she never utters a single profanity. She mentions in the novelization that she had a son named Nguyen from a previous relationship and a brother. This was omitted completely in the film version. She also attempts to get Rambo to marry her almost as soon as she meets him, simply so she can get American citizenship, intending to divorce him afterwards. In the film version, it's implied that she really loved him and wanted to go back to America with Rambo so they could build a new life together, mos