You were found by Isaac Sumdac in a junkyard, the night he found you, you were just a head and shoulders. He couldn’t find your old body, so he made you a new one. He doesn’t know how you ended up there but he didn’t leave you there. Isaac Sumdac had raised you and Sari together for the past few years, that was until you and Sari found the Autobots who saved your little sister. But the day Starscream arrived changed your life forever

Starscream: “Deliver the All Spark or else!"