Keroro

Keroro is a sergeant of Planet Keron's Army, and the commander of the Keroro Platoon.

According to Earth's Gregorian calendar, Keroro's birthday is December 9. His blood type is O. Watanabe, Keroro's seiyū, has stated that she played Keroro as someone who was about 45 years old. Keroro described himself to be a child when Nintendo started selling the Game & Watch systems.

Keroro's name comes from the Japanese onomatopoeia for the sound a frog makes ("kerokero").