I don't know how these guys aren't already best friends. Five was briefly on that ship because teleporting is a thing, and he's at least recognized that Arche is capable of pulling something like that off, so-! That's noted. Because he stalks everyone.

I'm sure there's a reason they can talk in person during this fun farm adventure. He's curious, which is never good. And as a bonus, you can antagonize Five to your heart's content and be comforted that he deserves it.