Tuffnut Thorston is one of the main characters of the HTTYD movie, books and TV series. He owns a Hideous Zippleback along with his twin sister Ruffnut, Barf and Belch.
He and his siter are often seen fighting eachother over the same weapons (a shield for example) and are both wild, reckless and adrenaline junkers. He wants to look brave and intimidating but, when something happens (with the Zippleback and the Terrible Terror during training) he runs away scared saying that he was terribly scarred. He joined the fans of Hiccup once he shown to have the ability of treating dragons.