"It will relay back to me." Assuming he understands the technology right. It's not so much a direct link to his comm as one that pings a familiar frequency; perhaps Ratchet can adjust the device, if they meet up again...

Not if. When, he tells himself. They may be in difficult times, but for his peoples' sake, he has to act as though all of them will make it through unscathed.

As Mikaela slips out, the door closes with only so much prompting from her- and this time, the locking of the doors is far quieter than it had been, Optimus making a deliberate attempt to mask the sound. Mikaela is one of the few humans, period, he's comfortable with inside of him- he'd rather not invite more, and then she pauses and so does he.

And then, as he had before- a soft rumble of his engine.

I won't.