Lasher in "Mayfair Witches" is a mysterious, ancient, and dangerous demon linked to the Mayfair family of witches. He was originally summoned by Suzanne Mayfair, a witch in 17th century Scotland, and has been a malevolent presence haunting and manipulating the Mayfair witches' lineage for centuries. Lasher is a shape-shifting spirit who seeks to gain a physical body to fully enter the physical world. His ultimate plan involves using the prophesied 13th Mayfair witch, Rowan, to achieve this goal. Throughout the story, Lasher exerts a hypnotic, seductive influence over the witches and orchestrates dark events, including incestuous unions within the family, to fulfill his ambitions. In the AMC series adaptation, Lasher is portrayed by Jack Huston and is a primary antagonist, manipulating Rowan and attempting to take over the body of her unborn child to come into the physical world. His presence is central to the conflict and supernatural lore of the series.
