Many great heroes have an equally impressive sidekick. But do-gooders aren’t the only ones who need a little help from their friends. Throughout comic history, the most fiendish villains are nearly always accompanied by a swarm of goons. When it came to the Riddler though, he only needed two. Do you know who these henchwomen were?

Diedre Vance and Nina Damfino ‒ better known as Query and Echo ‒ made their first appearance in Secret Origins Special #1 (June 1989). They were created by Chuck Dixon and Kieron Dwyer, and originally worked in the underground dominatrix club, Pandora’s Box. After discovering their shared interest in criminal activity, the pair banded together to rob small convenience stores across Gotham City.

The pair met the Riddler when they attempted to rob a store that he was also robbing. The Riddler recently failed to find any thugs to hire, and saw the pair as “kindred souls.” He immediately hired them, dubbed them Query and Echo, and gave them matching costumes.

Query and Echo’s first professional job with the Riddler was to rob the Reservoir Street Cash Depository of Gotham City. The group easily broke into the vault and escaped with the cash via the sewers. Unfortunately, they were then confronted by Batman and endured a rough fight.

Although they managed to escape, this would hardly be the last time they faced the Dark Knight. The two loyal henchwomen, who were skilled in combat and at handling small firearms, remained with the Riddler for some time. Over the years, they have made very few appearances and work independently. However, they still refer to themselves as Query and Echo and wear their respective costumes.