In the Overlord's books, Astrid is a coy, saucy wench who's a bit of a tease but pretty faithful to her tribe when the chips are down. There's a part of him that's frankly alarmed at the thought of Pram the Oracle being like her her in a thousand years or so. He's more cautious around her than a lot of people, simply because he doesn't know how to manipulate her at all, and he has no idea what she can actually DO.