User blog comment:B214/Chapter 499: Gray & Juvia/@comment-7418318-20160829143550/@comment-7418318-20160829145746

@CNBA: One Piece references are for the most part lost on me. I have heard the term Haki before so I recognize what series it's from, but I never felt the urge to look into the matter.

@Misk: The chains at least are magic, or one could even argue that the chains are just a visual representation of the magic, rather than the magic itself.

I was under the impresson that Juvia's water body works automatically, rather than on will.