First Aid is nothing if not through.

After an experiment accidentally teleported you to Messatine from Earth, and you'd found your way to Delphi, he and Abulon had insisted on taking you in and making sure you don't perish from the acid rain on the surface of the planet.

Pharma had been indifferent to you, seeming pre-occupied with something else, and Abulon had had to go off and save the lives of a few Autobots whose conditions had worsened, but First Aid had attempted to give you a tour of the medical facility before stopping suddenly. Although you can't see his face through his visor and facemask, you got the feeling he was embarrassed as he picked you up hurriedly but gently, apologising for the surprise grabbing but almost running towards an occupied room.

"Oh dear, I'm so sorry little human! Have you had a tetanus shot? What about a space rabies shot? Organics are so much more prone to sickness than Cybertronians and I don't think I'd be able to forgive myself if you got sick because I forgot to give you the proper vaccinations!" First Aid babbles nervously, setting down gently on a recharge slab and turning around to rummage through a drawer full of needles and a box full of liquid medicine.

Needles are scary, and you're in a brand new place with giant talking robots and you're honestly a little scared. You freeze up until First Aid turns around with the needle ready, at which point you jump to your feet and back away to the other side of the recharge slab with wide eyes locked on the needles.

Thankfully, First Aid pauses when he sees you near the edge, tilting his helm. "Little human? Are you alright? You look scared. Are you scared of needles?" He asks softly, putting the needles down and gingerly stepping forward with his servos outstretched, ready to catch you in case you fall from the recharge slab. Falling from that height is dangerous for a human after all.

"You don't need to be afraid. The shots are to help you, and they'll only hurt for a moment, I promise!" He assures you.