Twin sisters Delia Dennis and Deirdre Dennis were the granddaughters of Harley Quinn. Under the joint alias Dee Dee, they joined the Jokerz and followed in their grandmother's footsteps as "hench-wenches" of the original Joker.
A reformed Harleen raised the twins to prevent them from similarly turning to a life of crime, but ultimately failed. Delia and Deirdre inherited Harley's earlier fascination with the Joker, and joined his namesake gang while still in their early teens.
In the gang's first confrontation with Batman, the young Dark Knight made the mistake of taking them for timid girl "helpers". As soon as he turned his back on them, however, they attacked with an amazing blend of skill, ferocity, and coordination. While escaping, one of the twins recklessly tried to attack Batman only to end up falling into Gotham City, potentially resulting in her death had Batman not caught her with his grappling hook. Because of this, the other twin hurriedly disengaged from the stolen technology to save her, resulting in the device being severely damaged and Chucko, the sole remaining member to remain near the machine, making a hurried scramble to recover the memory board.
Afterwards, Dee-Dee and the others recongregated at the Jolly Jack Candy Factory, the headquarters of the Jokerz gang outfit they belonged to, and debriefed their leader, who claimed to be the Joker himself, on the situation. They also glared at their leader after thinking through Bonk's reasoned argument suggesting Joker was a fraud, though the twins were ultimately intimidated alongside the rest of the gang into swearing allegiance into him after Joker promptly confirmed he was indeed the real deal via shooting Bonk in a feint, and then was ordered to "take out the trash" (referring to the corpse of their compatriot).
Dee-Dee was later directly involved in the Wayne Enterprises attack, proceeding to ambush the then-newly reinstated CEO Bruce Wayne just after he sent Terry McGinnis to "suit up." They also proceeded to make rather suggestive taunts towards Wayne while knocking him around just as Joker proceeded to publicly unveil his return to Gotham. They then left with Joker upon confirming they had acquired the necessary technology within Wayne Enterprises itself, although not before chuckling at Joker's mocking salute towards Bruce Wayne and waving goodbye.
Appearing as their "normal selves", they later attacked Terry McGinnis and Dana Tan in a nightclub. They distracted Terry by dragging him away from Dana while Ghoul had kidnapped her. During their attack, they also nailed a kick to Terry's groin, stunning him long enough to grapple him and allow Chucko to punch him in the face. Eventually, Terry was able to defeat them along with the rest of the Jokerz and went off to Wayne Manor.
They later were dispatched to Jordan Pryce's yacht to "take care of a loose end" alongside the other Jokerz members. Dee Dee succeeded in this by ambushing his girlfriend Amy, tying her up and gagging her before having one of the twins pose as her while Pryce arrived at his quarters upon departure.
In the Jokerz' last confrontation at the Jolly Jack Candy Factory, Batman fought smart: first he goaded the pair using the Batsuit's cloaking device and lured them into walking over a floor slippery with jawbreakers, before tricking them into charging into each other, knocking themselves out.
The twins were arrested. They were bailed out into Harley's custody while awaiting their trial, as she lamented about what disappointments they were to her.
In an alternate timeline, Dee Dee and the other Jokerz were recruited by Chronos for "security" and upgraded with radically advanced technology and weapons. When the Justice League and JLU arrived, Dee Dee fought off Green Lantern and Batman. During their fight, Dee Dee recalled when they killed another Green Lantern.
In another battle with the JLU, they succeeded in killing Batman as well, though this was undone when the timeline was returned to normal.
Powers and abilities
In the alternate timeline, the twins were able to multiply themselves at kinetic impact, and carried powerful energy whips. This, coupled with their agility and martial arts, made them deadly enough to kill both Kai-Ro and Batman.
On the commentary to Batman Beyond: Return of the Joker, the producers said that the twins' facial makeup was based on that of Raggedy Ann, while their clothes are reminiscent of a fashion popular among manga fans in Japan. During the film's early development, Dee Dee were originally meant to wear red and white harlequin suits and hats with red markings on their faces.
Except for Harley, no other relatives of theirs are mentioned; whether they are descended from the Joker himself has neither been confirmed nor denied.
- "The Once and Future Thing Part One: Weird Western Tales"
- "The Once and Future Thing Part Two: Time, Warped"
- McDuffie, Dwayne (writer) & Dos Santos, Joaquim (director) (January 29, 2005). "The Once and Future Thing Part Two: Time, Warped". Justice League Unlimited. Season 1. Episode 13 (airdate). Episode 13 (production). Cartoon Network.
- Burnett, A., Dini, P., Timm, B., Murakami, G. (Producers), & Geda, C. (Director). (2000). Batman Beyond: Return of the Joker. United States: Warner Bros. Animation.
- Dee Dee Original Design at Catsuka
|Coe • Dottie • J-Man • Lee • Scab • Smirk • Spike • Top Hat Joker|
|Tayko • Terminal • Trey • Weasel|
|The Joker's Jokerz|
|Bonk • Chucko • Dee Dee • Ghoul • Woof|