Paul Dini is a screenwriter and cartoonist who has worked on a lot of Batman media. Starting with Batman: The Animated Series and progressing into Batman Beyond as well as other shows in the D.C. Animated Universe. He has also written a number of comics for D.C. as well as the stories for Rocksteady's Batman games Batman: Arkham Asylum and Batman: Arkham City. He is also responsible for the creation of Harley Quinn.