The Molly Mayne version of the Harlequin first appeared in All-American Comics #89 and was created by Robert Kanigher and Irwin Hasen.

The unidentified Harlequin first appeared in Green Lantern Corps Quarterly #5 and was created by Ron Marz and Jim Balent.

The original Harlequin was Molly Mayne who appeared in stories alongside the Golden Age Green Lantern (Alan Scott).

[2] Mayne developed a crush on Scott and, donning a colorful costume (which included harlequin glasses, a conical hat and a mandolin), started a life of crime to attract his attention.

Years later, after the death of his first wife Rose Canton, Alan Scott realized that he had loved Molly all this time and they got married.

In despair over the rift this had caused between them, Molly sold her soul to the demon Neron in return for youth during the "Underworld Unleashed" storyline.

Scott fought his way through Hell to obtain it and, with the help of the young Green Lantern Kyle Rayner, returned it to the Harlequin's body.

[3] During the Brightest Day crossover event, Molly briefly appears when Alan's daughter Jenny arrives at the Scott home in search of her father's old lantern.

Molly informs her stepdaughter that Alan had been depressed in recent weeks, as Jenny had not been to visit her family since her resurrection at the close of the Blackest Night crossover event.

[5] A panel in "The New Golden Age" one-shot revealed that Harlequin has a son named Michael Mayne through an unknown man.

[a] In Pre-Crisis continuity, she later revealed her true father was Two-Face, joined the Teen Titans and renamed herself the Harlequin.

Soon after, Duela is killed by a rogue Monitor in issue #1 of Countdown, following a failed kidnapping attempt on a celebrity and pursuit from Jason Todd.

It is later revealed that she is a native of Earth-3 and the biological daughter of the Jokester and Three-Face (Evelyn Dent), that world's heroic equivalents of the Joker and Two-Face.

The Manhunters gave her a job working at KGLX radio in Gotham City, alongside Molly Mayne-Scott, who was a former agent called the Harlequin.

When the Manhunters began to strike at Earth, Marcie stole Molly's illusion-casting glasses, taking the identity of the Harlequin.

This new Harlequin is shown standing next to the Golden Glider in Underworld Unleashed #1 (November 1995), whom some misinterpreted as being Marcie Cooper herself.

She created illusions of a decrepit version of Molly, while she flooded Scott's head with visions of them together (in space, as barbarians, as detectives and eventually as medieval warriors).

Scott was able to break free when he unleashed his simmering rage against her and showed her a world where he ruled over Hell and she was his captive slave.

Her secondary tool is a mandolin with an extending handle which she uses as a defensive weapon, especially against the Golden Age Green Lantern (due to his ring's weakness to its wooden construction).