Ginevra Weasley was very punk rock, thank you very much. She was so punk rock that she was penpals with He-Who-Must-Not-Be-Named at age of eleven.
Sure, Harry was great (after all, had she not had a crush on him since she first met him?), but this princess could battle the dragons on her own.
Honestly, it was just that a lot of things suddenly became easier after she got out of the Chamber alive and well, and nothing much bothered her after that.
She still picked the lock on the toolshed and secretly rode on a broomstick until she was accepted in the team, and she still loved having a butterbeer mustache, but she no longer had her eyes only for Harry and she no longer cared about her family’s views of what a young lady should do.
No, the only thing she grew to care about was the fact that anything was possible if you had enough nerve.