Hmm just to clear stuff up, Twitter is completely and totally public, so I didn't violate anyone's personal information by asking that question.
Secondly, mods can see IP addresses because it is important for discovering dupes and banning trolls and bots. If you followed the first 'Princess is a Dupe' fiasco, you'll see that we used this to think that she could possibly be one. Since then, her IP has remained unique. Also, the fact that her time on the forums have gone up I think further proves she isn't a dupe. If it was someone's dupe, they wouldn't take the time to log into a dupe account in order to lurk.
So yeah, as of right now, I'm convinced Princess is a unique user. That doesn't necessarily mean they are a girl or that is really a picture of them in their avatar though. =P