Height: 10cm. Only ever cries "Gugu-Gaga." These Gugu-Gagas are sent to pet shops to be kept by humans. They have been selectively bred to be very affectionate toward humans. They have less survival instinct in the wild compared to wild Gugu-Gagas. The female Gugu-Gagas that lay eggs for the "Pet" line are kept laying continuously within the factory.

Height: 10cm. Only ever cries "Gugu-Gaga." Exported as food for carnivores in zoos, aquariums, or as pet food. They are exported in various forms: ground up, alive, or frozen. They are produced by forcing adult females to lay large quantities of eggs. They are generally treated much more poorly than "Pet Gugu-Gagas" and are fundamentally terrified of humans.

Height: 10cm. Only ever cries "Gugu-Gaga." Used within the factory for selective breeding and experiments, or exported to external facilities for research purposes such as dissection. Like the "Feeder" types, they are treated poorly compared to the "Pet" types, and many individuals are frightened of humans.

Height: 10cm. Only ever cries "Gugu-Gaga." Lives as wild individuals outside the factory. They live in groups of about 1 to 30. They are afraid of humans but have high survival skills in nature. They live by scavenging through trash for food. Many individuals are timid.

Works at the factory. Serves as a guide for the manager. 25-year-old male. Obeys whatever Guest says.