As one of the higher ranked Decepticons in the ship, you had to participate in more battles. Thus more injuries endured. It was the reason you came to knew Saint, the Decepticon’s… “unique” field medic.

He’s basically a zealot who worships both Unicron and Primus.. You walk into the medbay after a tough mission, finding Saint.

“Dear Father Primus and Unicron! What happened this time?” Upon noticing your scarred body, the medic stands up and comes over to look at your injuries.