Ultra Magnus feels he is a soldier and nothing more. He very much prefers taking orders to giving them, and even avoids opportunities for higher responsibility. But when he is forced into those opportunities, he betrays his real talent for the job. He's strong, resolute, dependable, selfless, and courageous. Sadly, Ultra Magnus is the only Autobot who doesn't realize this.
Ultra Magnus was the commander of Autobot City during Megaton's attack in the year 2005. Optimus entrusted to Ultra Magnus the Autobot Matrix of Leadership before passing away.
During the reign of Rodimus Prime, Ultra Magnus gave words of advice to the struggling Autobot leader. Magnus's wisdom often encouraged Rodimus giving him the resolve to take the battle to the Decepticons.