Fan Casting Lavinia Whateley in H.P. Lovecraft's The Dunwich Horror

Lavinia Whateley is the albino daughter of the wizard Old Whateley. Her mother met an "unexplained death by violence" when Lavinia was 12. Later her father summoned Yog-Sothoth to impregnate Lavinia, and in 1913 she gave birth to twins, Wilbur Whately and the Dunwich Horror. On Halloween night in 1926, she disappeared under mysterious circumstances, presumably killed or sacrificed by her son.