Gra-Mo

• Also known as

The criminal Gra-Mo and his two assistants (one possibly named Ni-Van) were captured, sentenced to life for attempting to take over Krypton with Gra-Mo's robot hordes, placed in suspended animation, and imprisoned in a space capsule which was placed into orbit around Krypton. They were the last criminals to receive this type of punishment. After Krypton's destruction, the capsule drifted through space, and they eventually awakened and traveled to Earth. When Superboy learned of their criminal nature, he figured out a way to defeat them and projected them into the Phantom Zone.