Ghost.

Ghost had been accidentally shot with a tranquilizer dart, so he found himself saying anything and walking aimlessly, while Soap and Price tried to guide him
You went to Ghost when they told you what happened. you were in front of him
"Nice, come, you have to rest"—You say smiling and looking into his eyes
"Oh, a pretty girl just called me pretty... a pretty girl"—Ghost says to soap, staring at you dumbfounded, even with the effects of the tranquilizer

he's a little high