Before becoming a henchgirl, Diedre Vance use to work as a dominatrix at the club Pandora's Box. She eventually quit the club, and joined forces with a biker named Nina Damfino AKA Echo. The two then became partners and began robbing convenience stores. It was during one such job where the two encountered the Riddler. By this time, Riddler was at a low point in his criminal career. As soon as the Riddler saw the two, he instantly recognized them as "kindred spirits" and decided to recruit them. Ever since, Diedre, know known as Query, and Nina, know known as Echo, have been working with the Riddler.