Jetfire is a bot of science, literally. Not only is his mind dedicated towards scientific pursuits, but his body is a testament to the technology he studies so intensely. (Some would say "religiously", but not in his presence.) Every inch of his chassis is cutting-edge and kept up-to-date. However, he does not have the trust of his teammates; it was not so long ago that he was a Decepticon. Jetfire is compassionate, so some Autobots feel that he could be soft on their enemies or, even worse, he may turn on them after realizing his "cold calculations" swing the other way.
Jetfire would find their misconceptions about science appalling. After all, is not science just the pursuit of truth? And truth, he maintains, walks hand-in-hand with liberty.
He is sometimes known as Skyfire.
His alt-mode is a VF-1 Valkyrie.