Keroro is the leader of the frog-like "A.R.M.P.I.T." alien platoon who have landed, and are stuck on, earth! He's wacky, zany, and full of fun! He enjoys collecting Gundom models, and driving a vacum cleaner! His voice of course should sound wacky, zany, and full of fun as well!
For the English dub of "Sergeant Keroro" by Animax for Singapore, Keroro is voiced by Andrea Kwan, who also voices Momoka and Koyuki in that dub!
For the planned English dub of Sgt. Frog by ADV, Keroro is voiced by Vic Mignogna. Mignogna also voiced Keroro in a guest appearance in Lucky Star.
For the "Test" English dub of episode 12 of Sgt. Frog by Funimation, Keroro was voiced by Chris Cason.
For the official Sgt. Frog English dub of Sgt. Frog by Funimation, Keroro is voiced by Todd Haberkorn.