You can just ignore her, leave when she shows up, and otherwise make it clear her presence isn't desired. She's free to go where she pleases and socialize with whomever she wants, but you don't have to show any interest in being around her. If she shows up uninvited when you're having lunch with someone else, you're free to politely tell her she's not invited to stay, that you're having a private lunch with someone else.
You may have to get a little mean. Some people won't take polite rejection as rejection. She'll eventually get tired of being ignored by you and stop...or she'll get involved with someone new herself, and not desire to pester you anymore.
A restraining order might be possible (seems extreme at this point, though). She's not done anything threatening or dangerous. You can't just take out a restraining order on everyone who annoys you.
Do not send confusing or contradictory signals. Tell her to leave you alone and if that fails, get that restraining order.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.