Omby Amby is tall and slim, and wears a fierce moustache. Despite his moustache, he is as gentle as a child.
Omby Amby was the only private selected by the Tin Woodman for Ozma's journey to the Nome Kingdom to free the royal family of Ev. He was commanded by twenty-six superior officers and behaved admirably, obeying every order. At the feast celebrating the successful end to their mission, Omby Amby was promoted to Captain General by Princess Ozma herself. (Ozma of Oz)