Ultra Magnus generally appeared as a chief lieutenant to the leader of what fictional group of sentient robots?
Optimus Prime Optimus Prime is a fictional character from the "Transformers" franchise. He is the leader of the Autobots. A fictional group of sentient robots that can transform into other forms (e.g: cars and other objects) He is the most iconic of the Transformers, being frequently featured in Popular Culture.
Ori (Stargate) The Ori are fictional characters in the science fiction television series, "Stargate SG-1". They are a group of "ascended" beings who use their advanced technology and knowledge of the universe to attempt to trick non-ascended humans into worshipping them as gods.