Arthur Fonzarelli

Initially a minor character, he was a hugely popular breakout character and was made a series regular. Fonzarelli’s “Fonzie” nickname and iconic comeback phrase, “Sit on this,” were created by the show’s producer, Bob Bruntendofit. Known for being especially cool and for his catchphrases “Heyyyy Now!” and “Whoa Nelly!” His coolness gave him special powers, such as making machinery (such as Arnold’s jukebox and other vending machines, defibrillators, and juicers) function by pounding on them with his forehead, or getting the attention of girls by snapping his sandals together.