Duela Dent first appeared as the Joker's Daughter in the Batman Family series of comic books.
She gained the attention of Robin (Dick Grayson), as she later claimed to be the daughter of the Catwoman, the Scarecrow, the Riddler and the Penguin.
An acrobat who possesses numerous "clown-motif" gadgets, she calls herself Duela Dent (while her true identity remains unknown) and acts as an ally to the Titans.
Her first significant Post-Crisis appearance was in the Team Titans comic book, as an aged patient in a mental hospital.
The writers of the title originally planned to reveal that Harlequin was a time-traveling member of the Team Titans driven insane by her time-warping experience.
Flamebird and Terra defeat her and return her to the Helping House Mental Institution in Industry, California.
Duela is a member of the splinter group Titans East, with writer Geoff Johns stating: "Yeah.
[5] In Teen Titans #43, Miss Martian and Cyborg arrive at Belle Reve prison to question their former teammate Bombshell, who has betrayed the team.
Duela and Enigma cut the prison's power supply, allowing the inmates to escape and attack Miss Martian and Cyborg.
[8] Dan DiDio, editor-in-chief of DC, has stated that Duela's murder would have a ripple effect throughout the series.
[9] 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.
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.
Refusing to accept the Joker's apparent death, she begins harming, murdering and destroying other people and property, to find him and get his attention.
[16] Much to the dismay of fellow member Harley Quinn, the Joker's Daughter is recruited as part of the New Suicide Squad.
I realize that Marv and company didn't want her around anymore and felt they had to explain her away because of continuity, but they could have just as easily ignored her.
It is noted throughout this series that the Joker's Daughter II is always quite dour and serious, quite the change from her namesake, and another example of the generational-clash theme of Kingdom Come.
Following the death of Von Bach, Ex1Machina points out that the Joker's Daughter II has undergone a drastic makeup change, with a tear tattooed beneath her eye.
In Tiny Titans #25, she briefly, (though accidentally) becomes a member of the Sinestro Corps when she wears a ring that Starfire buys at a pawn shop.
In the Titans Tomorrow storyline (which took place in a possible future), Duela destroyed Arkham Asylum and tried to reconcile with her father, who ignored her.
In a fit of rage she killed Batgirl (Cassandra Cain), Alfred Pennyworth and Bette Kane.
In the Ame-Comi storyline, an alternate universe where all the superheroes and villains are teen and 'tween female counterparts to the Earth One versions, Duela Dent appears as this continuity's "Joker".
Duela is Gotham's most dangerous criminal and the main antagonist to this continuity's "Batgirl" and Robin (Carrie Kelly Gordon).
In the alternate timeline of the Flashpoint event, Harvey Dent has twin children who are kidnapped by Joker.
[26] Chief James Gordon locates Joker with Dent's children in Wayne Manor and goes in without any backup.
[28] In the DC Bombshells continuity, the Joker's Daughter serves under the Third Reich during World War II and helps the Nazi cause by keeping magic users such as Raven and Zatanna under her control.