EDIT: I plan to do a re-work on “Fallen” in the future, so I took down the image. Here for your consideration is her backstory as originally written for the contest:
The Angel of Foresight wished to see the world through her own eyes, and so made a deal with a demon who promised to restore her vision. The demon branded her with the mark of the dragon, which would pollute her Grace and slowly transform her into a demon. Now able to intervene in the physical world, the angel uses her slowly deteriorating foresight and her half-demon powers to save human souls from her future masters before her own soul fades away.