Zoffy is the commander of the Inter Galactic Defense Force, as well as the second member and leader of the Ultra Brothers. He first appeared in the final episode of the original Ultraman TV series, thus becoming the very second Ultra-being from Nebula M78 to go to Earth. Zoffy reappeared many times later, helping the other Ultra Brothers through various difficult situations.
Zoffy was initially created as a way for Ultraman to return back to the Land of Light after his defeat by Zetton. However, the producers also wanted a way for the SSSP to be the ones defeating Zetton in the end, and they had to accomplish all of this within a single episode's runtime, and thus Zoffy was introduced. Zoffy's debut also led to the mentioning of the Inter Galactic Defense Force, which was further developed in future entries of the franchise.
Zoffy's name is derived from the German anglicization of the Greek name Σοφια (Sophia) , which translates to "wisdom", and was originally written as in original scripts, which carried over to Ultraman Ace and Ultraman Taro.