Gaff

From Off-world: The Blade Runner Wiki

Gaff is a Blade Runner in the film. He is played by Edward James Olmos.

Gaff, a mysterious character in the film, presents his compulsory invitation to Deckard in a street lingo called Cityspeak, (much of it invented by actor Edward James Olmos, parts of it are also in Polish) which Deckard pretends not to understand.

We learn quickly that Gaff is very different from Deckard. He dresses quite differently and behaves quite differently. He makes subtle observations about Deckard, sometimes by making little origami figures, and sometimes through his unfriendly comments.

In Blade Runner 2: The Edge of Human, Gaff dies on while on an assignment. Bryant attends his funeral and displays some distate towards the epitaph written in Cityspeak on Gaff's grave.