I'm not going to go too much into it without GM acceptance first, but the basic gist of it was to be an Occultist that was taken as a child and co-opted into being a harbinger for the return of Asmodeus (possibly in hell itself). Was released into Talingrade to prepare the way, but eventually arrested for trying to teleport a temple of Mitra into a place between planes, as well as distributing blasphemous texts. Also, probably an Aasimar, because why not?