She is portrayed to be pretty, gentle, sweet, the perfect and passive wife. When she interacts with Don Juan, however Donna Julia breaks out of the traditional role by being the older woman who is eager to educate young Juan in the ways of love. Byron thus reverses gender roles and with a sexually mature woman who actively seducing a naive and innocent young man. "Don Juan at sixteen is a pious mamma's boy, dedicated to heaven by a mother from hell (Eisler 612)". This relates directly to Byron as a youth who had been reared by a suffocating mother and prematurely initiated into sexuality by someone the family trusted. His mother unknowingly entrusted her son with a viper when she brought Donna Inez into the family home. While Donna Julia is not as vicious as May Grey, she took equal advantage of the family's trust.
Even more general attributes of this poem and it's characters reflect details from the author's own life. Juan is able to survive shipwreck because he could swim. Byron was also known as an exceptionally strong swimmer. Don Juan embarks on a grand adventure that includes travels very similar to Byron's own. He has a number of sexual conquests during his journey, as did the randy author. Even the naiveté of young Juan is strikingly similar to the shy young George