Imp was a character that rarely, if ever, appeared outside of the Filmation She-Ra series. Interestingly, a few other canons did attempt to bring him into existence, with vastly differing results. Here is the first of two images showing Imp outside of the cartoon. In this illustration from issue eight of the UK Princess of Power comic we see a much taller Imp with his proportions vastly different when compared to his Filmation counterpart. Aside from the differing design the most notable difference is that he is red!
(click on the image to see it at full-size)