Trailbreaker

It's hard not to like  Trailbreaker. He's a good-humored cheerleader, always ready with a joke or comment to lighten the mood when things get dark. Sadly, Trailbreaker's joking is often a cover for his low self-esteem. His form is the most fuel-consumptive of the Ark crew, and his vehicle mode is very slow. As such, he feels like a useless drain on their limited resources. The Autobots know better, of course. Trailbreaker's good humor, bravery, and impenetrable  force field are all of great use, but convincing him of that is hard, especially when he begins to mope about his handicaps.