Ralph Malph was a character in the sitcom 'Happy Days' played by Donny Most. He was Richie Cunningham's best friend and often provided comic relief. Potsie Weber was another character in the show, played by Anson Williams. He was a goofy, lovable friend of Richie and Ralph. Chachi Arcola was Fonzie's cousin, played by Scott Baio. He was a ladies' man and often caused trouble. Fonzie, or Arthur Fonzarelli, was the iconic character of the show, played by Henry Winkler. He was a cool, leather-jacket-wearing greaser who was always up for an adventure. Richie Cunningham was the main character of the show, played by Ron Howard. He was a good-natured, all-American teenager who was often the voice of reason.