Harley Quinn, created by Paul Dini and Bruce Timm, debuted in “Batman: The Animated Series” in 1992. Initially a psychiatrist, Harleen Quinzel transformed into the Joker’s accomplice. Known for her red and black harlequin costume, Harley has a complex relationship with the Joker. Over time, she evolved into an independent character and antihero. Portrayed by Margot Robbie in the DCEU films, Harley has appeared in various media, including comics, animated series, and video games. Her unpredictable nature and cultural impact have made her an iconic figure, transcending comic book fandom.