You may know her as Barb from Stranger Things or Sierra Burgess, Netflix’s “loser,” but one of our favorite Shannon Purser roles is as Ethel Muggs, from Riverdale. In this episode of Absurd Fan Theories, Shannon stopped by ELLE to talk all things Jughead Jones, Betty Cooper, Cheryl Blossom... and that one time Ethel dumped a milkshake on Veronica Lodge’s head. Plus, she sets some things straight about Noah Centineo.