With an A Physical Level (superhuman strength & endurance) and an A Mental Level (genius-level intellect), he is probably the most dangerous of 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 lifespan. He is able to use J.
Sebastian to get a meeting with Tyrell, the founder of the company and his creator. Tyrell refers to him as his "prodigal son" and tells him his life cannot be extended but he should revel in the life that he has, as he has done and seen things others could only dream of. Batty kills Tyrell and Sebastian.
Deckard retires the remaining replicants and is hunted by a dying Roy. Deckard ends up dangling from a building and is saved from the fall by Roy. As he dies, Roy tells Deckard about the things he has seen and how the memories will be "lost in time, like tears in rain". In the novel, Do Androids Dream of Electric Sheep? His name was spelled "Roy Baty" and was the leader of the eight replicants who killed their human owners so that they could escape their life of slavery on Mars.
Roy was married to Irmgard Baty, another replicant. In the novel, Roy's relationship with Pris (who was his lover in the film) is only one of friendship.
Leather coat (complex) (Wire Can be free to shape). Body with hands X 2.