Real Name: Duela Dent
Occupation: Criminal
Marital Status: Single
Base of Operations: Gotham City/Earth 3
Height: N/A
Weight: N/A
Eyes: N/A
Hair: N/A
First Appearance: Batman Family #6 (1976)
Created By: Bob Rozakis

Pre-Crisis:
In Pre-Crisis history, Duela Dent first appeared as Joker's Daughter in the Batman Family series of comic books. She then gained the attention of Robin as she later claimed to be the daughter of Catwoman, Scarecrow, Riddler, and Penguin. She found out Robin's identity and he revealed her identity as that of Duela Dent, Two-Face's daughter.

Duela claimed she wanted to join the Teen Titans to make up for her father's crimes. Not everyone was for this idea. She changed her identity to Harlequin. As Harlequin, Duela utilized gimmicks such as smoke-cloud inducing powder puffs and bullet-firing lipstick.

She has shown up in Gotham where she called herself Card Queen while infiltrating a criminal organization called MAZE.

Post-Crisis:

Delusional and schizophrenic, the mysterious Harlequin has been in and out mental institutions for several years. An acrobat who possesses numerous "clown-motif" gadgets, she has been called Duela Dent, but her true identity remains unknown.

Harlequin aided the Titans during the Technis Imperative, when Cyborg's automated system sought out all Titans allies, past and present. Although she was still in a mental institution at the time, Duela was rescued by Cyborg and helped battle the Justice League for Cyborg's soul. Following this she insisting to anyone who would listen that the Titans would soon be contacting her about membership. She also claimed she was the daughter of Doomsday.

Gar's obnoxious cousin Matt decided to hold a membership drive for the new version of Teen Titans West, "Titans L.A." Harlequin crashed the official meeting-turned-party with a small group of villains, including Beast Boy's enemies Fear and Loathing, simply because she hadn't been invited. Flamebird and Terra defeated her and returned her to The Helping House Mental Institution in Industry, California. No explanation was given as to where she found the dangerous villains that aided her party-crashing.

Duela is inexplicably socialized with several villains on their secret satellite headquarters. Duela makes a handful of wild claims as to her parentage, all of which are dismissed by the non-plussed villains. The only new wrinkle added to her tale in this story was a claim that she had been resucitated by the Lazarus Pit and, most interestingly, that her mother may actually be the villainous parent she has always claimed.

Duela returned to action alongside almost every former Titans member against Dr. Light and again during the Infinite Crisis to fight against Superboy-Prime.

The Joker's Daughter and Enigma both served on the Teen Titans during the lost year. Duela is a member of the splinter group Titans East.

Miss Martian and Cyborg arrive at Belle Reve prison to question their former team mate Bombshell, who has betrayed the team. Risk and Batgirl arrive, and Batgirl murders Bombshell by slitting her throat with a razor sharp batarang. Duela and Enigma cut the prison's power supply, allowing the inmates to escape and attack Miss Martian and Cyborg.

During the attack, Enigma comments to Duela: "Wait'll dear old daddy gets a load of us!"

The two are the captors and tormentors of Raven, whom they torture psychologically. Duela reveals that she joined Titans East simply because they asked. Raven points out that Duela has always been an ally of the Titans, and offers her membership on the team. Duela accepts the invitation by punching Enigma, and fights alongside the Titans against Titans East. When the battle ends, Duela and Batgirl disappear.

Duela appears in the first issue of Countdown. She abducts a teen celebrity from a nightclub, only to be stopped by Jason Todd. She claims that she comes from an alternate Earth. After escaping, Duela is killed by a Monitor, who states, "This world is not yours. Your presence in it is not tolerated. The penalty is death." When informed of Duela's death, the Joker says he never had a daughter. The Monitor of New Earth suggests that Duela's father is actually an alternate version of the Joker, indicating "She didn't belong [...] making others think she was the Joker's daughter. Which on that world, she most certainly was not." Dan DiDio, editor-in-chief of DC, has stated that Duela's murder will have a ripple effect throughout the series. Nightwing, Robin, Donna Troy, Wonder Girl, and Ravager set out to investigate Duela's death, but their inquiries are cut short by one of the Monitors, who diverts their attention elsewhere.

In Countdown Presents The Search for Ray Palmer: Crime Society it is revealed that Earth-3's heroic version of the Joker, the Jokester, is the father of Duela Dent, and that her mother was Evelyn Dent, Three-Face (the Earth-3 version of Two-Face). She was raised by Three-Face and her stepfather, the Earth-3 Riddler, and together the three formed the Riddler Family. When she was finally introduced to her birth father, she dropped cryptic hints implying that she or her consciousness shifts unknowingly from Earth to Earth - the source of her parental confusion. When the Jokester joined the Riddler Family, Duela revealed that she had been in a relationship with Talon, Owlman's teenaged sidekick. The Jokester renounced her as his daughter and Duela left with Talon moments before the Crime Society stormed their apartment. The Riddler was killed by Ultraman and Three-Face's arm was torn off by Superwoman; the Jokester managed to flee.