Dion Henshaw is the brother of Donna Henshaw and the son of Donna's dad. He is known to act like a 'gangster' and says "Suck my fat hairy cock!" to Gaz during their meeting. Donna has a strong dislike of him, as noted when she says "I hate family, they're bastards." He breaks Gaz's 'World's best mechanic' trophy, which causes Gaz to say " I know why nobody wants ya!", causing Dion to run, and Donna to have to comfort him, despite her hatred of him.

He is known to have had sex with Louise, and he is the father of Louise Louise Brooks.