The Julia in the SPQR stories by John Maddox Roberts is the daughter of Lucius Julius Caesar, a fictitious brother of Gaius Julius Caesar, wife to the equally fictitious narrator of the stories Decius Caecilius Metellus, the Younger. She is described as having wheat-colored hair, large gray eyes, and a beautiful speaking voice.
She is very conscious of her patrician status and of her public persona. She is loving, but not necessary obedient wife to Decius. As the series goes on, she becomes very distressed about her apparent inability to bring a pregnancy to term. She wants to become a priestess of Venus Genetrix, but she cannot without at least one living child. Decius has assured her that he does not love her less, and would not think of divorcing her over it, but he knows that other people may deride her for it.
She differs from Decius in being very devoted to her uncle, Caius Julius Caesar; she refuses to believe any ill of him.