The Pineappletree

Either there were only isolated single cells to begin with or, if there were more communal areas he still would be put in isolation just so the other prisoners wouldn't kill him. While the COI obviously doesn't care much for the lifes of their prisoners, I don't believe they would want them to die for nothing (by simply killing each other). The other prisoners would be either from the COI or from Eden and both have a good reason to hate Simon. There is a high chance some of them would want to beat him up or outright kill him, so he's put in isolation so it doesn't come to that.

At least i have all my fanfics saved online.

They start meeting up regularly and Grace starts showing Simon all kinds of different things. From how to buy bus tickets to going to the cinema togeter. Grace is really happy he made a friend in this new city. Meanwhile Simon is feeling really guilty because Grace doesn't know who he is and Simon thinks he would bate him if he ever finds out. Bjt he likes their friendship too much to actually tell Grace about his past.

Iron Lung, I'm coming.

The Martian is about how nothing is not worth sacrificing if it saves a single human life.