Halloween // Devil’s Advocate?

So I work in a school and I try to theme my costumes somewhat education-related (Notorious RBG and Rosie the Riveter were two of my faves.)

This year I want to play Devil’s Advocate: Horns and tail, red outfit, but at a loss for what makes the advocate part. Aside from actually printing the word on my clothes or carrying a lawyer-ly prop (my position is fairly active so that’s kind of out of the question), I’m stumped.

Got any ideas, hive mind?