Keroro is the titular character of the anime series 'Keroro Gunsou,' also known as 'Sgt. Frog.' He is a frog-like alien and the leader of the Space Invasion Army Special Tactics Platoon, sent to conquer Earth. However, Keroro is easily distracted by his love for Earth's pop culture, especially model kits, and often neglects his mission. His comical antics and interactions with the humans who discovered him lead to humorous situations. Despite his ambitious plans for world domination, his incompetence and laziness ensure that Earth remains safe from his schemes.