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Echo is the name of several unrelated characters in the DC Universe, primarily used as an alias for one of the Riddler's sidekicks Query and Echo. In the Golden Age, Echo was an enemy of the Crimson Avenger. Vicki Grant briefly became Echo using the H-Dial. Terri Eckhart is a member of Conglomerate. Isabelle Cheranov is another enemy to Batman. There is also an Echo who fights the Legion of Super-Heroes in the 30th Century, a member of the Legion of Super-Villains.