Thread closed because this is has been an ongoing mystery for many years and there are several different threads on the subject and everyone bumps their own individual threads and misses out on the latest developments.
If she ever is known, someone will post about it so no need for you or anyone to bump threads about it as she has a significant number of people who are wondering the same thing. I confidently predict however that she will never be ID'd. She clearly won't have done anything else though so it's kind of a worthless pursuit if you ask me.