She is first seen during Toxie's visit to Tokyo, harassing a young woman named Masami. She then calls over two of her male cronies to help her. While the men only make sexual advances towards Masami, the Bad Girl's imagination gets a bit carried away, as she begins making enthusiastic "air punch" motions, seemingly seeing the assault as far more violent than it really is.
His Tromatons sensing the presence of evil, Toxie quickly rescues the girl from the villainous trio and hunts them down one by one, saving Bad Girl for last. He corners her inside of a radio station, binds her with cable and brutally transfroms her into the "first human transmitter". The character is never seen again, though do to the comical nature of violent consequences in the film, it is unkown if the character was actually killed by this treatment.