Julia is the daughter of the Gigants (or humans) who live in the Big House. Jay seems to have a connection to her.Julia is estimated to be over a very heavy 90 tons or over 180,000 pounds and is referred to as "the littlest gigant", by the Beat Bugs. for example. Why they use the term GIGANT instead of GIANT isn't clear. She becomes a big sister to Jude. Despite being one of the littlest gigant, Julia is still quite large compared to the bugs and sometimes can be a force to be reckoned with. 