Nine
He stares at the massive door for what seems to be a very long time, weighting a decision that's already made. They have to move out and find what happened to the World.
The alternatives are only two. Opening the vault now, or getting themselves some extra time to rest and prepare.
Meanwhile he hears that Faust found his precious banjo. The instrument is not in good shape, but looks salvageable.
"I'm sure you can make it play again. And also hope that you play it well." He says, giving Faust a smile. He wants to make a joke, something to lift spirits, but nothing comes out. Socializing definitively isn't one of his strong points...
Next Faust starts to unfold his many identities, with obvious satisfaction, and the first thing that comes to his mind is arresting him. The second thing that comes is how stupid the first one is, considering their situation.
Nine turns his back to the door and watches his companions. Charlie found three necklaces that obviously mean a lot to her, because she just puts then all around her neck.
He observes with admiration the many things Arthur brings out of the boxes. The guy clearly spent some time getting ready for a situation like theirs. Knife, lighting kit, headtorch, gun... even some notebooks and a camera!
Jay is still checking the crates, and Robin... Well, she's just sitting there, her thoughts clearly somewhere else.
Arthur notices Nine's own gun. "Better wait till I can give that a proper look at and service, or we might end up calling you eight instead."
Nine looks at it and nods affirmatively. "Yeah! Thanks!"
He hated the nick in the beginning, and got into a few fights over it, but things changed, and some people he liked used it. Sophie called him Nine, and there was that time, in the jungle... A smile crosses his face. "Yes, let's keep it at Nine."
Then they are talking about hitting people with coin-filled socks, and his smile grows larger. Usually he would laugh at the idea, but they had just defeated a killer robot with water bottles, so better not overlook the sock... And Arthur has a point.
What if this was all an experiment? A sadistic, cruel one, no doubt, but still fitting the Vault Tech way of doing things. "If you're right and this is all an elaborate play... Well, someone will get punched in the face."
Nine turns to face the door again. Soon he feel Arthur getting closer, muttering something. They stood there for a while. "Ey, Diffy, there's somewhere for you to stick that overblown wristwatch of yours for when we want to open this door." He says, leaving Nine wondering if he means 'different' or something else...
"Yes, that's the question." He speaks louder so everyone can hear. "Do we want to open it right now, or wait for the morning?"