Echo, designated CT-21-0408, was a clone trooper who served in the Grand Army of the Republic during the Clone Wars. Known for "echoing" the standard rules and procedures established for clones, hence his name, Echo lived within Tipoca City, the capital city of the planet Kamino, early in his career, training in its military complex. As a clone cadet, Echo was part of the squad Domino Squad, overseen by the Siniteen bounty hunter Bric. Echo stayed with Domino Squad until the unit passed their fi