Karen Hayes is a fictional character from the television series 24. She serves as the Deputy Chief of Staff and later becomes the Chief of Staff during the show's run. Known for her intelligence and strong leadership skills, Karen plays a crucial role in navigating the complex political landscape surrounding national security threats. Throughout the series, Karen often collaborates with key characters like Jack Bauer and David Palmer. Her character is portrayed as dedicated and resourceful, often facing moral dilemmas while trying to balance her professional responsibilities with personal ethics.