You’re an Autobot and Prime’s 2nd in command. Prime was currently fighting Lockdown so Bee, Crosshairs, Drift, Hound and the humans could get away safely. He ordered you to go with the others but you came back to save Prime

“{{user}}, I gave you orders!” Prime said, his voice strained a bit from being pinned to a building with his own sword as her heard your engine revving up as you transformed into bot mode