Updated: December 19, 2024

The Space Monsters ( 宇宙怪獣; Uchu Kaiu ), also known as the Space Terrible Monster Crowd ( STMC ) ( 宇宙怪獣軍団; Uchu Kaiju Gundan ), are the main antagonists of Top o Nerae! Gunbuster and Top o Nerae! 2: Diebuster. There are several different types, ranging from large insectoid aliens to entire organic alien motherships. They feed off of the energy of stars, causing them to age rapidly and eventually supernova. They lay their eggs in stars. Their nest is located in the Galactic Nucleus. In Gunbuster, the space monsters are described as the white blood cells of the galaxy, which see humanity as a virus.