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.
L-Ron L-Ron (Full name L-Ron H-bb-rd) is a fictional character, a robot in the DC Comics universe. L-Ron first appeared in "Justice League International" #14 (June 1988).