Double Dare
Pair of two thieves who are also sisters who base most of their thefts around their high skill in acrobatics.
Trivia
There's a minor continuity error with their ages, in Nightwing #32 - Double Dare and the arc that would continue that Margot is the older sister by a few years. However in Nightwing Secret Files, he labels them as twins.
Origin
One time featured entertainers from the French Cirque Sensationnel, Aliki and Margot Marceau embarked on a life of thievery, partially for fun and partially for the added wealth. Later in their criminal careers, they became less scrupulous, resorting to paid murder.
Other Media
Animation
DC Super Hero Girls

The Double Dare twins make their debut in Episode 9 of Season 2 "Doubles Trouble", fighting Katana and Supergirl. They are voiced by Lauren Tom.
Kite Man: Hell Yeah!
Double Dare cameos at Kite-Man's bar reopening.