Thundercracker is a Decepticon who lives on being the "master of fear" to his opponents. Cruising at Mach 6, his victims can hear him coming from 200 miles away, which is the way he likes it-it's not worth the effort it takes to kill them unless they're nice and terrified first. He doesn't care much about galactic conquest or the AllSpark, but as long as Megatron allows him to indulge himself, he's happy to serve.