His stature is consistent with his power, as he is portrayed as being an enormous and imposing man who is of greater size and physical bulk than even Marv.
Unlike the other antagonists, he acts measured and thoughtful, as he sees revenge as an unnecessary extravagance and will often take losses with a fair amount of dignity when hostile action will serve no practical purpose.
He also proves to be one of the few men able to resist Ava Lord's wiles (going so far as to mock her, pointing out that her sexual allure is her only great weapon and that she wields it clumsily, affecting men in ways that do not aid her, such as Mort), and is rarely directly involved with the perpetration of his organization's crimes.
This was previously confirmed in the one-shot Sex & Violence when a fan noticed that The Colonel and The Salesman have the same haircut and inquired about it to Frank Miller in the letter section "BLAM!".
He initially served Ava Lord and, following her death at the hands of Dwight McCarthy, was later recruited by the Colonel and Wallenquist.
He is also nigh indestructible, having been crucified (by Miho), shot repeatedly (by Dwight) and savagely beaten numerous times (by Marv and Wallace).
In the deleted scenes of the movie adaptation, he was shown to have momentarily escaped from the assault with Schutz and another thug, only to be sliced down the middle by Miho in an alleyway moments later.
She was unable to seduce Wallace and later calls him a Monk before Maxine drugs him and Gordo pushes the car down a cliff.
She also works for the Colonel as a spy, mainly because she didn't want her mother to discover that she was a prostitute, partly because he offered her a considerable sum of money and a new life.
Kidnaps and overpowers Esther under the Colonel's orders after incapacitating Wallace with narcotics in Hell and Back.
Mariah kills him and his companion, Orrin, to make sure that Wallace doesn't extract any valuable information from him.