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Starscream is a sneaky, backstabbing Decepticon who thinks he's the second-in-command, but really just wants to be king. He's smart, but always messes up because he's a total idiot.
"Starscream tried to take over the Decepticons again, and it ended with him getting kicked in the face by Megatron."
"I swear, every time Starscream makes a plan, it ends with him getting laughed at."
"Starscream's latest plan was to steal Megatron's crown, and it backfired because he forgot to charge his battery."