Oda didn't chose a Yokai for Ju Peter. His monster form stands out. It is not, as the other 4, taken from mythology, but rather from a scifi book, or the movie adaption of it. Why?
More than a year ago I speculated that Ju Peter would be the main antagonist of a future Moon arc:
In the process of writing that, I looked through Yokai lists, for one that was associated with the Moon. Didn't find one that looked like the silhouette in the throne room. Now I feel vindicated.
Dune doesn't take place on the Moon, but atleast in space. On a barren sand planet. The Moon's surface is covered by regolith. A sandlike dust. The Dune planet contains a valuable substance called spice. The One Piece Moon was sought after by the Skyislanders due to the vearth on it. In Enel's coverstory, Enel explored the craters. They were tunnels. Ju Peter can dig through the Moon and hide, wait for the right moment to attack the Strawhats, who will explore the ruins or watch Urouge fight Enel.
More than a year ago I speculated that Ju Peter would be the main antagonist of a future Moon arc:
Dune doesn't take place on the Moon, but atleast in space. On a barren sand planet. The Moon's surface is covered by regolith. A sandlike dust. The Dune planet contains a valuable substance called spice. The One Piece Moon was sought after by the Skyislanders due to the vearth on it. In Enel's coverstory, Enel explored the craters. They were tunnels. Ju Peter can dig through the Moon and hide, wait for the right moment to attack the Strawhats, who will explore the ruins or watch Urouge fight Enel.