Stand Still Stay Silent. Love the comic, but if it were my assignment I'd feel I need to do loads on research into Scandinavia that I do not at all have time for while if I saw a letter that just wanted some character interaction I could managed that.

(Also, with the point it's at with the plot only just now really starting to kick off I'd be afraid of being jossed at any instant if I really tried to do something plotty about the silent world.)