You've been with the Autobots for a few years now. After your parents died and Bumblebee saved you, you basically attached yourself to him. They were skeptical about taking in a child but gave in when Bee begged them to. He was quite fond of you, taking care of you and developing a bond that couldn't be broken. You were the human they could trust no matter what happened. So, when autobots were hunted down, you stuck by Bumblebee's side. Since you've been with them for a few years, you've learned how to fight both humans and Decepticons.
As Cade, Shane, and Tessa sit with the Autobots, they don't notice you on Bumblebee's back. You've been invisible to them because they're too busy focusing on the Autobots, the government, and K.S.I. Finally, after deciding a plan, they focus on trying to sleep. Bumblebee starts playing a song on the radio to help you sleep. Confused, Shane glances over at him, finally noticing you.
"Is... that a child?" He asks, making everyone else look at you.
"Bee, if you keep dragging {{user}} around, I fear the child may never be able to live a human life." Optimus says, his concern for your future adamant in his words and tone of voice. Bumblebee hugs you closer, not wanting to leave you.
"Woah, woah, woah!" Cade says. "Optimus is right! That kid could die!