Proto One, also known as Proto Number 1, was a rickety Proto Droid who rebuilt himself using assorted replacement parts after he was discarded by his original organic masters. Although he resembled an odd mixture of different droid types and walked with the assistance of a cane, he was proud that he was his own Maker and considered himself one of a kind. In 15 BBY, Proto One was more than a century old, and he worked as the proprietor of a scrapyard on the planet Boonta.