Riley Poole is a fictional character from the National Treasure film series, portrayed by actor Justin Bartha. He is a tech-savvy and witty sidekick to the main character, Benjamin Gates, played by Nicolas Cage. Riley provides comic relief and assists in solving puzzles and uncovering historical secrets throughout the adventures. In the films, Riley is depicted as a computer expert who helps decode clues and navigate challenges. His character adds depth to the story, showcasing the importance of teamwork and friendship in the pursuit of treasure and historical discovery.