Fan Casting Leon Kowalski in Blade Runner

Leon Kowalski, serial number N6MAC41717, was a Nexus-6 replicant and friend of Roy Batty, leader of a group that sought to extend their brief lifespans. His emotions were at a much lower level of development than Roy's, but he evidently believed in Roy's quest for more life. Leon was classified as mental level C. He did not have the speed of thought Roy had when it came to getting through a situation, resorting instead to simple violence. Leon had cherished photographs of his friends.