Keroro is an adult Keronian with green and white skin, with a yellow hat and star designs on his hat and belly. Whenever Keroro is caught in an explosion, he is seen with a large, comical black afro, which is a call to the anime’s first ending sequence “Afro Sergeant”. It has become a running joke throughout the series, “Keroro Gunso.” This hair style is also seen on other characters in the series.