Harley Quinn has had legions of loyal fans for ages. For a long time, I mainly knew her as the Joker’s girlfriend on Batman: The Animated Series. I knew DC had brought her into their comics’ continuity. I knew she and the Joker had broken up (maybe? sort of?). I knew she’d shifted from villain to antihero to star in her own comic. I’d heard her referred to as “DC’s Deadpool.” But what about her brought such adoration among readers? In a 2016 interview with Vulture, DC Comics’ Publisher and CCO Jim Lee said, “I refer to her as the fourth pillar in our publishing line, behind Superman, Batman, and Wonder Woman.” That’s HUGE. Lee is equating Harley to DC’s Trinity, their Big Three, the foundation upon which DC is built. After reading the near 100 comics comprising Amanda Conner and Jimmy Palmiotti’s run on Harley Quinn (yes, I got excited and bought them all (no, I have no regrets)) I get it.