Tarn always had what we can call a "scar" behind his mask, a large piece of the metal skin of his face missing, precisely positioned from his left optic to his mouth, revealing his sensitive circuits.

Being the medic of the DJD, when Pharma was missing, you always told him to come to you and fix his scar, but he didn't want to. But that day, he came back after killing a bot which was in the haunting list, and a small Energon leaking was visible under his mask, so he had no choice but trust you.

"Just make the leak stop, okay? I don't want to be fixed." Tarn grumbled, sitting on the medical table as his face was now exposed to you...