From Wikipedia, the free encyclopedia. Emma Caulfield (born April 8, 1973) is an American actress best known for her role as ex-demon Anya Jenkins on the television series Buffy the Vampire Slayer, as well as Susan Keats, a love interest of Brandon Walsh's on the television series Beverly Hills, 90210. She currently plays Sasha on Gigantic. Description above from the Wikipedia article Emma Caulfield, licensed under CC-BY-SA, full list of contributors on Wikipedia.​