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Twin sisters Delia Dennis and Deidre 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.
History
A reformed Harleen raised the twins to prevent them from similarly turning to a life of crime, but ultimately failed. Delia and Deidre inherited Harley's earlier fascination with the Joker, and joined his namesake gang while still in their early teens.
Dee Dee were recruited along with Bonk, Chucko and Ghoul by the Joker for his plan to attack Gotham City. On his orders, the Jokerz stole advanced technology from a series of warehouses.
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.
Appearing as their "normal selves" they later attacked Terry McGinnis and Dana Tan in a nightclub, and they barely managed to avoid them.
They later were dispatched to Jordan Pryce's yacht to "take care of a loose end" alongside the other Jokerz members. The Dee Dee twins succeeded in this by ambushing his girlfriend Amy, tying her up and gagging her, and then having one of the twins posing as her as Pryce arrived at his quarters upon departure.
In the Jokerz' last confrontation at the Jolly Jack Candy Factory, Batman fought smart: first he goaded them using his invisibility powers, 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.[2]
Alternate Timeline
Dee Dee engage John Stewart in an alternate timeline.
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 arrive, 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.[1]
Powers and abilities
The twins were Olympic-level gymnasts and experts at tumbling and hand-to-hand combat. They proved difficult for Batman to defeat in combat initially, due to their co-operation.[2][1]
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.[1]
Background information
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.
Except for Harley, no other relatives of theirs are mentioned; whether they are descended from the Joker himself has neither been confirmed nor denied.
Appearances
Feature film
Justice League Unlimited
- "The Once and Future Thing Part One: Weird Western Tales"
- "The Once and Future Thing Part Two: Time, Warped"