Skyfire

Early Life
Skyfire was a young bot who trained alongside the Aerialbots. At this point, they were a firefighter squad that worked alongside the Elite Guard. When Skyfire had finished his training, he joined the Aerialbots and fought side by side with Silverbolt. The two became friends and worked together for a long time.

After some time with the Aerialbots, Skyfire became a scientist. He started working in Crystal City. There Skyfire met a fellow scientist named Starscream. The two became friends and kept working together. During this, Skyfire joined the Seekers and met both Thundercracker and Skywarp.

Great Civil War
During the Great Civil War, Skyfire and the three Seekers were stationed on Moonbase 2. There they worked on some Dark Energon which were found there. Skyfire and Starscream had become best friends, but when Megatron arrived, Starscream didn't hesitate to join the Decepticons. Skyfire wouldn't and left Moonbase 2 for Cybertron.

Back on Cybertron, Skyfire joined the Autobots and fought the Decepticons. He met and befriended the Autobot commander Optimus during this even though he worked close to Sentinel Prime, the Autobot leader.

During the war, Skyfire was assigned to go out to investigate a signal seen on another planet. Doing so, he disappeared and got to the planet Earth. Skyfire was never found and it is unknown if the Autobots will find him when they get to Earth after leaving Cybertron in the Ark.