Played by: Harrison FordHe is a "Blade Runner", a special member of the Los Angeles Police Department whose job is to hunt and "retire" replicants which have been declared illegal on Earth.
Played by: Sean YoungRachael is the latest experiment of Eldon Tyrell. Tyrell believes that as the replicants have such a limited lifespan, they have little time to develop control of their emotions, causing difficulty managing them. He believes implanting them with memories would create a cushion which would allow for emotional development, and make them more controllable. Rachael has the implanted memories of Tyrell's niece, and she is led to believe that she is human. It is not revealed in the film how long she has been living, but Tyrell admits that he thinks she is beginning to suspect the truth of her existence. When Rachael learns the truth, she is ignored by Tyrell. In desperation, she turns to Deckard, who has been told by Captain Bryant to retire her. He eventually falls in love with her.
Played by: Rutger HauerRoy Batty is the leader of the renegade Nexus-6 replicants and the main antagonist of the film. He is highly intelligent, fast, and skilled at combat, and yet still learning how to deal with developing emotions. With an A Physical Level (superhuman strength & endurance) and an A Mental Level (genius-level intellect), he is probably the most dangerous of all the fugitive replicants. He is a combat model, used off-world for military service. He and five other replicants come to Earth, hoping to find a way to lengthen their life span.
Played by: Daryl HannahShe is a "basic pleasure model". She is the girlfriend of Roy Batty. At an A Physical Level, she is shown to have superhuman endurance (as in the scene where she grabs a boiling egg with her bare hand without harm). Her B Mental Level puts her at a lower intellectual level than Roy.
Played by: Brion JamesLeon Kowalski is a replicant who came to Earth with five others looking to extend their lives. He has an A physical level, which enables him to have superhuman strength and endurance (according to the Final Cut he was used as a 180 kg/400 lb nuclear-head loader in the outer space colonies as well as a front-line soldier). Leon is classified mental level C. He doesn't have the speed of thought that Roy does when it comes to solving problems.
Dr. Eldon Tyrell
Played by: Joe TurkelDr. Eldon Tyrell is the genius who has built up the large Tyrell Corporation. He is the creator of the Replicants.
Played by: William SandersonA genetic designer working for Tyrell. He is not allowed to emigrate off-world .