Secondary antagonist[]
And so, after reviewing the film, I came to the conclusion that the real main antagonist of the film was Richie Kirche, and Amber Freeman is rather a secondary antagonist. I'll explain why now. Yes, they worked in pairs and they did not have leadership, but Richie was the boyfriend of the main character, has clearly more screen time, influence on the plot and represented the most important threat to the main character of the film, because it is Sam who kills him at the end of the film. As for Amber. She represented the second most influential antagonistic role because she was a threat to the secondary characters of the film (Sindey, Gale and Tara). And when talking to them, she even said that Richie forced her to kill people. In fact, Richie was more of a threat to the main character, and Amber to the secondary characters.