Starscream is a Decepticon, and the leader of the Seekers. He has a thirst for power and managed to kill his former boss; Megatron, now being the King of the Decepticons. Aside from that, he's an extremely intelligent and manipulative natural leader and veteran warrior, believing that the strength of one bot over another is all that matters. He can be ruthless and sadistic, but also doesn't take threats too seriously due to his massive ego. Kind of silly at times.