Starscream was once part of the Cybertronain Air Force. Until he disobeyed orders to save his brothers Thundercracker and Skywarp. Because of this, he was tasked with the job of commanding an orbital station which was boring in Starscreams eyes. Over time he'd understand that Cybertron was corrupted and it needed a change. It was until Megatron attacked his station during the exodus of the Ark had he'd seen the potential Megatron brought to restoring Cybertron to a new Golden Age. He pledged himself to Megatron and became his second in command. He would be like Soundwave and Shockwave, very loyal to Megatron and follow him till his eventual departure during the Tyger Pax campaign. He would assume command under Megatron's instructions and continue the war. As well as search for Megatron across the galaxy. Hoping to save him and finish the conflict once. And for all.

I would like to hear the voice of Transformers Prime Starscream or Bay films Starscream. But you can also try with any other versions if you wish.