In Blade Runner, the replicant who leads the escaped group is Roy Batty.
Roy Batty is a Nexus-6 replicant portrayed by Rutger Hauer in Ridley Scott’s 1982 film. He and several other advanced replicants escape from an off-world colony and return to Los Angeles seeking a way to extend their artificially limited lives. Their rebellion brings them into conflict with Rick Deckard, a former police officer recruited to hunt them down.
Roy is physically superior to humans but faces the same four-year lifespan imposed on Nexus-6 models. His search for his creator, Eldon Tyrell, drives the film’s questions about mortality, memory, identity, and what makes someone human. Hauer’s performance, especially Roy’s final “tears in rain” speech, is one of the film’s most celebrated elements.
Roy is sometimes mistaken for Leon, another escaped replicant and the first one Deckard confronts. Roy is the group’s leader and the character who reaches Tyrell. The film is based loosely on Philip K. Dick’s novel Do Androids Dream of Electric Sheep?