She's from her version of the afterlife - she tends to the dead there, I believe. And people who die with regrets in her world can become something called a "hollow". I can put you two in touch if you like - it was a casual conversation some time ago, when we were comparing and contrasting our respective afterlives.

I think it's actually a bit strange that people from the same world tend to know one another - worlds are generally pretty big places!