I didn't really think the Risen Emperor was an angel; it was my understanding that he was a mortal from the time of the old empire that was brought out of the vault by the angel of death's archangel, and given power by the followers of an image of himself that existed inside the vault. Lareth(Laroth) was the angel of good intentions, wasn't he? I mean its been a long time since I've read through the civipedia, but that was my understanding of it.