Queenie is a prisoner, who is serving a sentence in Dickens Hill Prison along with Den Watts. He goes by the name of Queenie because he is an effeminate homosexual. The other prisoners refer to him as "she" rather than "he", despite the fact that he is a large, butch looking man, with a moustache. Although Queenie acts in a camp manner, he is actually tough and the other prisoners know not to mess with him. Nick Cotton often gets on his wrong side due to his homophobic slurs, and he is eventually given a beating because of this.
It is revealed that Queenie is on The Firm's payroll along with another prisoner, Johnny Harris. When The Firm believe that Den is trying to frame them, Queenie and Harris seek Den out, intending to give him a severe beating. Den eludes this for a while, but Queenie and his gang eventually corner him, leaving him bruised and battered with a fractured arm.
After The Firm discover Den is not the informant, he begins to suspect that it is Queenie. Den concocts a plan to catch him out. He gives him the false name of a drug dealer and as he predicts, it isn't long before the police are questioning Den about him, confirming that Queenie is the "grass". Den stuns Queenie with his discovery, but instead of turning him in to The Firm he uses him to provide information on them.