Tim Drake coming out as bisexual is of the most momentous occasions in the third Robin's life, and it was foreshadowed by Harley Quinn of all people. A brief interaction between the two shows Harley recognizing something in Tim that would take him quite some time to admit publicly.
It was a happy moment in-universe and out when Batman's third Robin, Tim, came out publicly as bisexual. The development wasn't just an additional layer of characterization for Tim, but a significant step towards LGBTQ+ representation in a medium that has been criticized as lacking in that regard. While there have been a number of queer comic characters through the years, Drake's coming out was one of the most high-profile reveals in recent years, up there with Superman Jonathan Kent, who also came out as bi at roughly the same time. Tim joins a number of other canonically bi characters in the DC Universe such as Wonder Woman, Constantine and Harley Quinn.
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Speaking of Harley, it looks like she was able to pick up something about the Boy Wonder years before he would come out. The two wind up crossing one another's path in the 2001 comic Harley Quinn #10 by Karl Kesel and Terry Dodson. Someone has a hit out on Harley Quinn's life and she can't stand to be cooped up in her apartment with no company other than her gang. She comes up with the brilliant (to her, at least) idea to investigate the hit by dressing up as Batgirl to protect her identity while out and about. Unfortunately, she gets a little too into the role and comes face-to-face with a bewildered Robin. As Tim demands to know who she is, Harley attempts to deflect the young hero's questions by asking Tim if
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