The Colonel, also known as The Salesman and The Man, is an antagonist in the Sin City comic series.
He is portrayed by Josh Hartnett in the 2005 film.
Sin City comics
He is a shadowy poetic freelance assassin who performs a lot of jobs for the ladies, the cops and the Mafia. He trains and co-ordinates assassins, and is one himself at some point. He runs an organ harvesting ring as well as other ventures in organized crime. His operations are eventually shut down by the Basin City Police in a sting operation and he is captured and shot by Commissioner Liebowitz after mouthing off to him. He also worked as an enforcer for Herr Wallenquist.
Sin City Movie (2005)
In the opening act, The Customer is Always Right, he steps out on to the balcony of a hotel to meet The Customer. As they talk, he offers her a cigarette, she continues to say that she is tired of running, and they kiss. As they kiss, he shoots her in the back and says that he will cash her check in the morning. Some believe, because of their credits in the closing credits, that he was hired by The Customer to kill her.
In the ending, Becky, begins to leave the hospital accompanied with a broken arm. She boards the elevator, and there we see The Salesman, who offers her a cigarette. This may imply that he kills her in the end.