Echo & Query
Successful super-villains hire henchmen to help with their crimes - usually burly men with low IQ's that can hit hard. But the Riddler has hired assistants that better fit his highly-stylized crimes - Echo and Query.
Echo and Query have been faithful assistants to the Riddler, providing brawn to the Riddler's brainy crimes. While very attractive females, Echo and Query are a dangerous, thrill-seeking pair who enjoy pain and crime.