Charles is physically imposing, with a deep, gravelly voice and 6'5 1/2" stature. His last name is never mentioned or revealed. With Wee-Bey Brice in prison, he becomes the Barksdale Organization's chief enforcer, working directly under Stringer Bell, who runs the crime family while Avon Barksdale is imprisoned. He objects to Stringer putting product before territory after the loss of the high rise projects. When Avon is released, Slim Charles becomes his chief enforcer in the war with Marlo Stanfield. Although Charles proves himself a capable soldier on many occasions, the support he gathered around himself was not up to the task.