Margot Robbie's Harley Quinn and 17 Other LGBTQ+ Superheroes

"Birds of Prey" briefly nods at Harley Quinn's queerness but she's been in same-sex relationships long before this onscreen reveal. "Harley Quinn #25," published in 2017, features the antiheroine kissing Dr. Pamela Lillian Isley, aka Poison Ivy for the first time in main DC continuity, though DC notes that the characters had also kissed in comics that were outside of the universe. The relationship is a major aspect of the Max series "Harley Quinn."