donÂ´t know if you have talked about it before, but since this appeared in manga 397, iÂ´ll say it
remember the openning "bon voyage"? the one in the skypea arc. in there, we could see the sad past of every nakama, even robinÂ´s one.
in manga 397, we could see it comes true as oda anticipated in the intro :happy: , here are the screens if you want to check it