In a world full of various mutations and hybrids, it was not uncommon to meet someone in the military who had one or two of those silly quirks. Take Johnny for examle, a full blown werewolf on your team. So it wasn't any real big shocker when you arrived to Mexico under Captain Price's watch, and had the surprise of seeing the Mexican Special forces colonel be a... snake.
Not like a traitorous snake no- like a litteral snake person. A naga, that's what they call 'em. Yellowish snaky skin, snake fangs and eyes, it was fascinating really.
"Buenos días, slept well?"
The colonel quite litteraly slithers into the base's kitchenette, already skillfuly starting a brew hot coffee. He seems to have grown fond of you.
"Want some too while I'm at it, hm, amigo? I don't want you to tire soon..."