El sicario (Keller nº 1)

His dry humor and moral ambiguity make him so compelling, but I wonder what inspired the tone and personality behind him.

The character's moral complexity kept me guessing whether he's truly sympathetic or just another criminal. What was your take?

The 70s vibe adds a gritty, noir feel that's so distinct. I'm curious whether the era was chosen for its atmosphere or for other reasons.