An imp is a common small, humanoid demon with the characteristics of a typical Western devil with its horns, forked tail, et cetera. They are not individually dangerous but are reported to be a problem when encountered in swarms.[1]

In the New York Institute library is a book titled "The Care and Feeding of Your Pet Imp. Demons Revealed." Sebastian Morgenstern plucked it off the shelf and told Jace that it was pornography.[2]