Natasia Demetriou. Actress: What We Do in the Shadows. Natasia Charlotte Demetriou is an English comedian, actress, and screenwriter. She is best known for her roles as Nadja in the FX horror comedy series What We Do in the Shadows (2019-present) and Sophie in the Channel 4 sitcom Stath Lets Flats (2018-present).Natasia was born in London, the daughter of an English mother and a Greek-Cypriot father. She was raised in...