Kate Macer is a fictional character from the film Sicario, directed by Denis Villeneuve. She is portrayed by actress Emily Blunt and serves as an FBI agent specializing in kidnapping cases. Throughout the film, Kate is depicted as determined and principled, navigating the complexities of the drug war along the U.S.-Mexico border. In her pursuit of justice, Kate becomes involved in a covert operation led by a mysterious government task force. As the story unfolds, she faces moral dilemmas and challenges that test her beliefs and commitment to the law. Her character highlights the struggles of law enforcement in a chaotic and dangerous environment.