I'd like to build on top of my previous thread about a broadsheet purports to have an account on a worldhopper who wears this mask, and is described to have "piercing eyes and a face like some otherworldly beast."
I've never really made a theory before, but I wouldn't be surprised if this was a Southerner from Bands of Mourning. Furthermore, the account may have been exaggerated as we often see in newspapers and the like. Now, it appeared in a pool, so it's possibly a worldhopper.
We know that Iyatil from the Stormlight Archive is a worldhopper, and she wears a mask. It's described as red-orange carapace mask.
This is a flimsy theory, but what if Iyatil isn't from Roshar? What if Iyatil is one of the Southerners, from Scadrial itself?
What do you all think?