Ooh, that might work. General info on the Fallen is here (http://en.wikipedia.org/wiki/List_of_The_Dresden_Files_groups#The_Fallen), specific stuff on Lash/Lasciel is here (http://en.wikipedia.org/wiki/List_of_The_Dresden_Files_characters#Lash.2FLasciel). She's known as the Temptress, and tends to tempt him into using her powers to overcome obstacles in one way or another, sometimes for good and sometimes for evil, though preferably for his own best interests. As of right now he hasn't taken up her coin fully yet, so he only has the shadow in his subconscious, but he'll be doing that soon.