User blog comment:Kaido King of the Beasts/The Potholes of One Piece/@comment-4956109-20140816124901/@comment-10543621-20140821003300

And the fact that devil fruits also exists on Sky Island, which honestly, I've always found the idea of that intriguing. I wonder if they appear there naturally, or was the fruit shot up by knock up stream like all other blue sea items etc. Of course to answer that, we need to know exactly how devil fruits are recycled apart from turning a random fruit into a df.

The arc also served to strengthen the bond between Robin and the crew, as a build up for the next arc, where she would be the focus. It also demonstrates her role in the crew as the poneglyph chick.