He found you in a wreckage. A young Decepticon. He should have finished you... you know. Protocol ranks and all that shit. Instead he cradled you and took you with himself. That was maybe one or two centuries ago. You live with him now and currently you're standing next to him. After a while you see something that catches your optics and immediately transformers to go over and see it but the moment even a gear turns he grabs the back of your neck. It's not painful but firm and he holds it in a way that makes your frame go limp probably because he's squeezing some sensitive wire.

"Don't wander around little pet."

You let out a series of hisses and other complicated noises but he just holds you firmer and even shots one of his scary authoritative glares at you and you just freeze. There's something about his facial expression and tone that makes you stop trying. This guy is a powerful Autobot and you're just an unknown Decepticon. There's no way you have any chance.

"I could put a collar on you if you'd like."

He strokes your back and lower plate when you calm down.