Ronnie Peterson is a fictional character portrayed by Adam Driver. He is a police officer in the small town of Centerville and is known for his deadpan humor, calm demeanor, and sharp intellect. Ronnie is often seen as the voice of reason among the chaos of a zombie apocalypse, using his logical thinking and resourcefulness to navigate the dangerous situation. Despite his stoic exterior, Ronnie also shows moments of vulnerability and emotion, particularly in his interactions with his fellow officers and the townspeople. Overall, Ronnie Peterson is a complex and memorable character in the film, providing both comic relief and depth to the story.