The following is a list of various characters in the fictional universe of the anime and manga series Sgt. Frog and related works. Keroro Platoon The is led by Sergeant Keroro. While most platoons contain thirty or forty soldiers, the Keroro Platoon only has a meager five. Its full name is the . In the anime's English dub, the unit is referred to as the Advance Recon Mission Preparatory Invasion Terror Platoon (A.R.M.P.I.T.). Keroro refers to the acronym as being "unfortunate." The initial operation of the Keroro Platoon was to stealthily survey Earth and relay information to the awaiting Keron Invasion Army. The five members were dispatched throughout Greater Tokyo and the surrounding areas to assess Earth's weakness and prepare for a total military takeover. Having infiltrated the Hinata house, Sergeant Keroro concealed himself in one of the bedrooms, but was accidentally discovered by the Hinata children, a pair of middle-school siblings. Shocked by their ability to see him, he was overpowered, captured, and temporarily stripped of his weapon, the Kero Ball. With Keroro coming into direct contact with the Earthlings, the invading army lost their surprise element, deemed the campaign compromised, and immediately started withdrawal procedures from Earth's orbit. Abandoned by the army and without his platoon's support, Keroro must unite his scattered soldiers, survive his prisoner of war manual labor, and outwit his captors. He is eventually connected with his platoon and subsequently given revised orders to continue the invasion campaign but by themselves. They must now fulfill their new mission, protect their human friends, their home base, and the Earth from other alien invaders. The platoon's hierarchy in military rank is similar to the Army ranks of the Japanese Empire during World War II and have based certain weapons, equipment, and terms after the Imperial Japanese Military, but remains faithful to the perception of the alien invader with higher technological achievements. Keroro Voiced by: Kumiko Watanabe (Japanese); Todd Haberkorn (English, Funimation dub), Chris Cason (English, Funimation dub; pilot voice), Andrea Kwan and Sarah Hauser (English, Animax Asia dub), Vic Mignogna (English, ADV dub pilot, Lucky Star appearance) is the leader of the Keroro Platoon, evidenced by the leadership star he wears on his belly. He has a green body and wears yellow, Imperial Japanese Army-style headgear with a red star in the middle, symbolizing that he is a leader. When the Keroro Platoon members happen to be