Julia is a beautiful and mysterious woman from both Spike and Vicious' pasts. A love triangle among the three caused Spike to leave the syndicate rather than challenge Vicious. Spike had wanted to take her with him when he left the syndicate, but she was blackmailed by Vicious into almost shooting Spike. Vicious found out they were planning to run away together and confronted Julia, telling her that she would have to kill Spike, or both of them would be killed. To protect not only herself but also the man she loved, she ran away, never meeting Spike at the cemetery as both of them had planned; Spike himself was never aware of her reasons for not meeting him until the very end of the series.

Julia only appears in flashbacks until the final two episodes of the series. She acts as a stark contrast to the world around her — her blonde hair, bright red umbrella and automobile stand out in the otherwise drab environments that she inhabits.

After meeting Faye Valentine by coincidence, Julia and Spike are reunited. However, soon they're ambushed by Vicious' henchmen, and one of them fatally injures Julia. Her last words to Spike are It's... just... a dream....

Julia's name comes from the Beatles song "Julia" on The White Album.