Interesting choice for someone who can make literal laser guns. Break Out the Museum Piece: His weapon of choice is a Mauser C96 'Red 9', a pistol that has not been in production since World War I.But if you look closely at him while playing the cabin siege level, he's somehow still sporting that mustache.
He has a pencil mustache in the early trailers, but it had been removed for some reason. He claims to have once been a police officer, which may account for it. He does his best to help Leon and Ashley.
He claims to have been a policeman in Madrid before later admitting that he was also once a researcher for Los Illuminados. Luis is a smooth-talking cad who shows up mysteriously to aid Leon from time to time before running off.