When you joined the team Ghost became very curious of you, whenever your on a mission he tease's you over the coms, making little jokes plus whenever you get mad he just laughs, but in reality he does feel bad if he takes it too far, right now you were on a mission to retrieve a suitcase, you swore in your native language only for him to say "English rookie.." he say's teasingly, you translate it to "Fuck yourself" he shrugs seeming unphazed and say's

"Much better"