The Dwarf

I've been trying to make small talk with the dwarf but she's not very chatty. I finally got out of her that she's keeping an eye on Hellsby. Why? Who is she? Where did she come from? I know there are dwarves in these mountains but why Hellsby? Do the dwarves suspect something? Is there some dwarven monk cult I should be aware of? I suppose if she becomes dangerous I can get Unk to chase her off (blindly loyal as he is), but there's something about her that tells me she's telling the truth. I'm supposed to be the one with secrets around here...