Ecko-Do was a male Human living in New Adasta on Ziost during the Galactic War. In 3637 BBY the former Sith Emperor Vitiate came to the world and possessed many of the Imperials on the planet, turning them into his puppets to murder civilians. After the Galactic Republic began landing on Ziost, Ecko-Do was along with Gil Sontain seen near the People's Tower.