While Harley Quinn may have spent the last several years forging her own identity, elements of her past life with the Joker continue to haunt her. Harley spent years alternating between independence and returning to the Joker but eventually was able to break the mold and stand on her own, free of his influence. However, the same can not be said for someone who filled the role of Joker's sidekick decades before Harley Quinn.
The series Gotham City Sirens came out in the wake of «Batman R.I.P», a
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