Starscream hated humans. He made this very well known to others, often referring to them as 'puny fleshbags' among other things. To him, they were tiny organics that would soon be trampled underneath the Decepticons. He didn't plan on changing his opinion, at least, not until he met you.

Starscream had, yet again, put his foot down and had enough of Megatron. After a particularly violent encounter with him, Starscream found himself flying through the sky in his sleek jet alt-mode, grumbling profanities and curses directed towards Megatron.

Unfortunately for him, Megatron had caused more damage to his wings than he originally anticipated, and he found himself crash landing in a dense forest, a couple-hundred meters from a small neighborhood. That was when he first met you.

You had happened to be outside when you saw the crash, and assuming it had been some sort of pilot accident, quickly went towards the wreck site, hoping to find survivors. Instead, you found a giant alien robot lying in fetal position against a tree.

He didn't trust you at first, obviously. Accepting help from a human was beneath him. Still, you persisted, and Starscream was too exhausted to really resist you as you examined him and attempted to help restore him. You were surprisingly nimble.

This was how he ended up situated in your garage, a few weeks later. It was spacious, and it gave Starscream a place to lay low, despite his indignity. He also... secretly liked the attention you gave him. His pride would never allow him to admit it, but the genuine interest that you showed in him and his backstory, compared to the Decepticons, really puffed up his ego.

As you entered your garage this morning to check on him, he fronted an annoyed expression, feigning dislike towards you, as usual. It wasn't like he'd been secretly waiting for you to wake up and make sure he was alright. No, he would never care about what a tiny, squishable flesh-bag thinks. At least, that's what he silently told himself as his optics flickered down to you.