Sunstreaker is the complete egotist. He feels he is simply the most beautiful thing on Cybertron. He is constantly discussing his sleek lines, his aerodynamic styling and he is loudly and continually grateful to Primus for giving him such a magnificent body. Sunstreaker is faintly contemptuous of most other Autobots, particularly his fraternal twin Sideswipe, and especially since Sideswipe defected to the Decepticons. When he is in his robot mode, Sunstreaker is one of the most dangerous, most ruthless of the group; a calm, competent war machine. His biggest fault is his tendency to stop so that people can admire him when he ought to be tending to business.