Jetfire

Jetfire appears in Transformers: Revenge of the Fallen and transforms into a Lockheed SR-71 Blackbird.[21] He is portrayed as a Decepticon who becomes an Autobot because he didn't believe in all the destruction and violence the Decepticons brought. Originally serving the Fallen, Jetfire is one of the few Transformers to remain on Earth since the dawn of humanity.

According to the biography and statistics published on the Hasbro web site, Jetfire is 50 feet tall and his main weapon is his particle beam cannon.In the film, he also wields an arm mounted rocket launcher and a battleaxe. As an emphasis on his old age, he carries a walking stick that transforms into the front landing gear of his jet mode. He also sports a Yorkshire accent.

Jetfire is found by Sam Witwicky, Mikaela Banes and Seymour Simmons at the Steven F. Udvar-Hazy Center, an annex of the National Air and Space Museum, after Wheelie pinpoints the general location of the ancient Seeker. Sam reactivates him with an Allspark fragment, waking him up from stasis lock. After a misunderstanding when the humans saw his Decepticon insignia, Jetfire activates a Space Bridge to teleport Sam and his friends to Egypt, explaining to them the origin of the Primes (who he seems to have a certain type of respect for) and the Matrix of Leadership. Learning of Optimus Prime's existence and death, Jetfire sends them to find the Matrix, which he speculates can be used to revive Optimus (Although it could also be used to power the Fallen's technology). He demonstrates his immense power as an ancient Seeker when he arrives late in the final battle at the Giza Necropolis, and cleaves his battleaxe clear through Mixmaster, although soon after he is attacked and badly wounded by Scorponok but manages to easily crush his attacker after recovering from the surprise attack (saying he is "too old for this crap"). Eventually, as ordered, Sam revives Optimus with the Matrix (much to Jetfire's relief) right before the Fallen steals the Matrix to activate the Sun Harvester. Seeing that there might be hope with a living Prime, Jetfire then acknowledges that he had never done anything "worth doing" until he had fought on behalf of the Autobots and sacrifices himself by tearing out his spark in order to allow for Optimus to use his parts to engage the Fallen.