## One Piece Chapter 433, pages 3-4: The Name of the Sea - Chapter: 433 - Pages: 3-4 - Characters: Koby, Monkey D. Luffy, Helmeppo, Nico Robin, Nami, Sanji ### Summary Page 3: Outside, Koby asks about the Straw Hats' route into the Grand Line. "SO, DID YOU GUYS ALSO GO OVER THAT MOUNTAIN TO ENTER THE GRAND LINE?" he asks. Luffy says no; they did not cross Reverse Mountain. Koby explains that Headquarters warships can cross the Calm Belts, though it is not one hundred percent guaranteed. Luffy remembers how dangerous the place was: "THERE ARE SO MANY SEA KINGS THAT ARE SEVERAL TIMES BIGGER THAN A WARSHIP IN THERE!!" Koby says the bottoms of the warships are patched with Kairoseki, stones that emit the same type of energy as the sea, so fish in the sea treat those ships as part of the water. Page 4: Koby continues the lesson while Nami listens from the pool and takes notes. "ENERGY OF THE SEA... I GOT IT!" she says. The Kairoseki lets ships pass above Sea Kings unnoticed, and Koby says, "MILITARY SCIENTISTS ARE DOING A PRETTY GOOD JOB...!!" Sanji tries to enjoy the swimming pool, but Nami snaps that she is wire-tapping right now. The little exchange turns into worldbuilding: a technology hidden under Marine ships has changed how they travel through seas that terrified the Straw Hats.