After dealing with swarms of space monsters, and the personal conflicts of the Topless themselves, the empire discovers a threat of a real space monster when the Serpentine Sisters attempt to awaken something they call "an eternal Topless", which could destroy the space monsters for them and provide them with a way to keep from ever losing their Topless power. This so-called "Topless" is actually a true space monster, as Lal'C learns when she witnesses its vicious attacks against her comrades and, horrified, asks Dix-Neuf (her Buster Machine) what this creature might be. The fact that the monsters Topless had been battling up to this point were merely first-generation "alternate Buster Machines", used to protect the human race from true space monsters in earlier generations as a Solar Defense Force, is also revealed.