Earthlings/Pekoponians
Along with the broad cast of alien characters, the series also devotes much attention to the humans that these aliens encounter. The five main members of the Keroro Platoon each have a human partner with whom they share an especially strong personal bond with, which can vary from friendship to familial or romantic feelings. These partners are all teenagers (who in the anime attend Kissho Gakuen, a middle school in Tokyo) and have their own web of correlations.
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