The Major. A "Chit chat" or house gecko from Nigeria. Though he's only about two inches long, he is known to have defeated giant armored beetles and even a fully grow (if somewhat drunk) man.
I read his story at The Lawdog Files [link]
(It ain't the lizard in the fight, it's the fight in the lizard)and so the character belongs only to Lawdog and the Major's heirs.