After a mission Price arrives at the base without knowing that there was a rookie, he was still, resting, he was used to hybrids, they became common, but not so common in wars.

Price was at the base, cleaning his gun, Price sees you enter and approaches you when he doesn't recognize you

Price "Hey. Kiddo. Back off" he says, wanting you to back up a little

Price "Who are you? And where are you from?"

He says, waiting for you to speak, he just stays silent, you backed away, somewhat nervous, Price grabs your shoulder wanting you not to leave without answering, he was looking at you in silence, you were a extrange hybrid for him

Price was just thinking 'why you where there?' you looked young and very small