Ah, wonderful. My favourite part is that it illustrates Graterras very well. Graterras is a shitty shitty place most of the time , so a lot of the heros are darker, and tend to not be 100% good. Graterras is a terrible land of Grey, where good and evil are not clearly cut.
I figured the Shawl would eventually be the weapon, by how much it was mentioned, and how you clued it in. And it is an interesting one, something I don't think a lot of people would guess if they didn't know what the challenge here was. And I like it too, it feels like it describes her personality in a way as well. Something Beautiful stained by it's experiences, into something more sinister.
So all in all, I really enjoy this tale. I would actually like to see it be expanded upon sometime lol.