One characteristic is independence. A 'bad girl' often doesn't follow the crowd blindly. She makes her own decisions and isn't afraid to stand alone if necessary. For instance, if everyone in her group is choosing a particular career path just because it's popular, she might go for something completely different that she's passionate about.
Creativity can also be a characteristic. A so - called 'bad girl' might have a unique sense of style, whether it's in fashion, art, or music. She doesn't conform to the traditional standards of beauty or creativity. Instead, she creates her own trends and expressions. For example, she might combine different music genres in a new and exciting way that no one has thought of before.