Harley Quinn - Batman: Arkham City: Harley Quinn is a notable character in Batman: Arkham City. The Internet went nuts when it was discovered that Harley's animations were motion-capt. Harley Quinn's Revenge is a story-based DLC available for Batman: Arkham City. It shows the events that happens after Joker's death and how it affected Batman and Harley Quinn, at the point of making her plan a whole operation to get revenge. Dr. Harleen Quinzel, better known as Harley Quinn, is the secondary antagonist of the Batman: Arkham franchise overall, appearing as the secondary antagonist of the videogame Batman: Arkham Asylum and its sequel Batman: Arkham City.