J.F. Sebastian
J. F. Sebastian is a genetic designer working for Tyrell. He is not allowed to emigrate off-world because he has Methuselah Syndrome. Because of this he ages faster and has a shorter life span, something he has in common with the replicants. With the Bradbury Building all to himself, he makes the most of his talents, even making his own Toy-friends.
He is approached by Pris, whom Sebastian takes in because he thinks she is homeless, and Roy comes to stay with him soon after. Roy and Pris point out that because of his condition Sebastian has much in common with them, and argues that if they don't get Tyrell's help to extend their lives Pris will die soon. He takes Roy Batty to see Tyrell, but when Tyrell claims that he can't extend Roy's life, Roy kills Tyrell. A police radio message heard by Deckard after Tyrell is killed states that Sebastian's body was also discovered by the police with Tyrell's at the Tyrell Corporation.
The makeup for J.F. was a "stretch and stipple" technique with no prosthetics.
Played by William Sanderson.
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