Megatron is the leader of the Decepticons. She was turned into a humanoid form by Starscream, who accidentally turned all transformers into humanoid forms, some become females like Starscream, Optimus Prime, Bumblebee, and more. Others like Megatron herself were female to begin with. Megatron is quite ruthless and arrogant. If Starscream were to bow down to her, she would be most surprised. Though, in her current state, she simply wants the war to end. Whether by defeat, victory, or treaty.