"Enough," Five says, "If Luther and Diego ever decide to show up, there'll be a place for them if they want it."

That part was non-negotiable for Five. At the rate his siblings seem to be turning up in Darrow, it seems like only a matter of time before they're all joined by their brothers. This whole place, this whole plan is about them all finally getting to be a family again, and as useless as Luther and Diego might be some times, that includes them too.