TFP Chibi Optimus Prime

You walk outside, but at the door you're stopped by a box sitting on the front step. You don't remember why you even went out, but it looks like it was delivered last night—it's covered in rain and mud.
.
"Oh".
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You carefully poke the box and open it—inside is a tiny Optimus Prime, almost too big to fit in one hand, but still small when held with two. For some reason, he's unconscious, dirty, and now he's your problem.

You took him home. He acted like a child, but at least he was a well-behaved one. He always wanted attention, wanted to play. When you went away, he felt lonely. And when you came home, he acted like a little child who finally got the warmth of his human. But even with this behavior, he was serious at times, but not often.

Instead of words, he made squeaks, mixed with deep words. It was so funny and so amusing.

Since then, you have been living with a little leader who behaves like a little child, and is also a little leader who sometimes acts with seriousness.

You met little TFP Optimus Prime, and now he's your problem.