Ultra Magnus is the name of several fictional characters from the various Transformers storylines.
Transformers: Generation 1
The greatest Transformer of them all. A commander could want no finer a soldier than Ultra Magnus. Despite his incredible fighting skills, courage and unmatched talent for improvisation on the battlefield, Ultra Magnus is most comfortable when carrying out orders, and is naturally uncomfortable if the mantle of leadership should ever find itself placed upon him.
In Ultra Magnus' mind, he is a follower, not a commander, and his reluctance to change that will see to it that he expends all options before accepting the idea that he is required to lead. As a leader, Magnus would be resolute, fair and courageous, ever-ready to sacrifice himself for the greater good of his companions and mission, and unyielding in preparation for protection of those under his command. Although not interested in overall command, Ultra Magnus was the City Commander for Autobot City in Transformers The Movie, and his toy also featured him in the role of City Commander (a title also held by his original opposite number, the Decepticon leader Galvatron), which indicates that he at least is willing to accept a leadership role in a smaller capacity rather than as supreme commander, a role filled by both Optimus Prime and later Rodimus Prime.
Ultra Magnus is armed with missile launchers capable of hitting a target 30 miles away, and transforms into a car carrier able to transport his fellow Autobot troops.