Harley's only gotten more and more popular as time has gone on, and it's getting to a point where some of her more modern fans might not be familiar with her background.

Source: https://screenrant.com/harley-quinn-new-tattoos-batman-animated-series-origin/

Speaking at length to the newspaper, she also shared pictures of a tattoo of Harley's initial she'd had done before their first in-person meeting.

Source: https://www.kentonline.co.uk/ashford/news/i-fell-in-love-with-jailbird-but-now-he-s-my-stalker-284674/

This issue is going to reveal Harley's ONE TRUE secret origin.

Source: https://bleedingcool.com/comics/knight-terrors-harley-quinn-2-preview-harleys-true-secret-origin/