One of the Space Policewomen, she always shows up just before the Keroro Platoon can successfully conquered Earth every time. Poyon frequently busts Keroro and his men for crimes they both intentionally and unintentionally commit and often fines them, sometimes resulting in the platoon going broke. She can travel anywhere instantaneously through the use of space portals.
As a member of the Space Policewomen, she consistently appears at the critical moment just before the Keroro Platoon can successfully conquer Earth. Poyon frequently arrests Keroro and his men for crimes they both commit intentionally and unintentionally, often fining them to the point where the platoon is financially ruined. She possesses the ability to instantly travel anywhere through space portals.