Ruffnut Thorstron is one of the main characters of the HTTYD movie and TV series but not existing in the books. She owns a Hideous Zippleback along with her twin brother Tuffnut, Barf and Belch.

She and her brother are often see fighting eachother over the same weapons (a shield for example) and are both wild, reckless and adrenaline junkers. She wasn't very fond of Hiccup at the beginning but once he shown a great ability to treat dragons, she bacme one of his fans, eventually flirting with him before Astrid interrupted her.