Giulia is one of the important characters of the Disney Studios cartoon Luca. She is a young girl living in the Italian village of Portorosso. She has been participating in the village triathlon for years, hoping to beat the town bully. But it’s not easy when she has to compete alone. Then Luca and Alberto, two young boys who happen to be sea monsters, show up, just wanting to discover the human world and buy a Vespa. They decide to race together and Giulia will welcome them for a while at her house. They will meet her father, a fisherman, and her cat Machiavelli who will soon discover their secret and not trust them.