She was dipping a toe in the pool of bad behavior in finding the temperature was just right. It was fun being a problem. Julia had been very very good for a very long time, and the funny thing about that was, if you’re too good too much of the time, people start to forget about you. You’re not a problem, so people can strike you off their list of things to worry about. Nobody makes a fuss over you. They make a fuss over the bad girls.

Specifically she was into dragons.
Quentin suppose it was an extension of the general Australian preoccupation with fatally dangerous animals. Start with saltwater crocodiles and box jellyfish and it was just a hop, skip, and a jump up the food chain before you got to dragons.

This was bad behavior, and she knew it. She did it because she was angry and because she disliked herself. The more she disliked herself, the more she took it out on other people, and the more she took it out on other people the more she disliked herself.