Trailbreaker

Trailbreaker (aka Trailcutter) is an Autobot and a badass wilderness commando. He posses an impermeable force field.

Transformers: Retribution
When Optimus Prime and the others were captured by the Quintessons, the remaining Autobots aboard the Ark contemplated their next move. Sunstreaker mentioned Trailbreaker as part of a strike force he would assemble to rescue the big guy and their friends.

"Enemy of My Enemy"
Following the restoration of Cybertron from the Great War, Trailbreaker was one of the many Autobots blacklisted by the new High Council for being a supporter of Optimus Prime.