Ruby Knowby

"Ruby Knowby" is one of The Dark Ones, specifically the one who wrote the Necronomicon Ex-Mortis during their rule over the Earth. While hunting Ash Williams, she claimed to be the daughter of Henrietta and Raymond Knowby and sister of Annie Knowby. She used the deaths of the Knowby family to recruit Amanda in her search for Ash Williams, telling her that he was responsible for the Deadite plague, and blaming him for the death of her "entire family".

She first appears in Ash vs. Evil Dead episode El Jefe. She is portrayed by Lucy Lawless.