The series is a based on the classic novella by Henry James, The Turn of the Screw, and it does not disappoint. Netflix's latest horror drama, The Haunting of Bly Manor, does not stray from this pattern of spooky horror and thriller works. Playing Viola is actress and screenwriter Kate Siegel, who is best known for her work in horror movies and TV series. After binging all nine episodes of Netflix's latest horror-drama The Haunting of Bly Manor, I had to know who plays the infamous yet faceless lady in the lake who stalks around the manor, waiting for her next unfortunate victim, also known as Viola Willoughby-Lloyd.