For some reason "it is a most fearful sight" cracks me up, LOL, I think it's the idea of Robin playing along, but still being her unruffled self. <33

I love Chopper's authoritative leaning in the second pic, and also Franky in the third, and Sanji's curly question mark, LOLOLOL.

As for the flag... I guess it was Franky, or Iceburg maybe? As jolly rogers go it's not too complicated, and we know Franky was very detailed about doing stull like Mini Merry (::waaaah::) so I can imagine him painting that too. I guess he could've got some random Galley-La painter dude to do it, of course, but I prefer to think that he or Iceburg did >.>