I thought about mentioning these questions at her forum, but I thought I'd just get us all talking here

And now I definitely don't want to get "stamped!"
I can't remember Magic Mourns ... was that a short story/novella? I don't see how Roland can be human, but maybe just not completely human. And maybe this is a big assumption, but wasn't Kate's mother human? So even if Roland was nonhuman, Kate would be at least partially human. But then in the second book (I really need to remember names better), there's the issue of women taking on the powers of their lovers if they take their seed. So would Kate's mother have been changed by that - more than temporarily? (This might start another issue of what would happen to Kate if she and Curran had unprotected sex.)
In one of the books I read - maybe it was the second one - Kate says that the magic left the world around the Stone Age. That would make Roland around that old if he was around when magic was still in the world - which I think sounds right. Wow, that would make him *really* old. Again in the second book (geez), Kate tries to save Bran by pouring magic into him and she hears/thinks "this is how undeath is created." So 1) Kate could make vampires or other forms of undead, and 2) is this how Roland started the People? But vampires aren't supposed to be over 200 years old (somewhere in the series, probably that pesky second book) because Kate was surprised to be attacked by a vampire ~ 300 years old. So what was Roland doing in the ages before then?
And as I started the third book (Burns?) last night, I smiled to see a connection - we see Kate trying to talk a banshee down from a telephone pole because the woman's family called on her. But I'd just read in the first book where Kate related a very similar story to an innkeeper/barkeeper (?) she knew who wanted to know if his nephew should to into the Order. She tells the story of a family who called on the Order to contain a harpy (I think). But it turns out that the harpy was the man's aunt and he didn't know it - and the harpy was atop some kind of pole or structure. But the Order killed her even though the man begged them not to. I wonder if that was a deliberate similarity or an accidental one.