One Piece · Water 7 Arc

Admiral Aokiji finds the crew, shows he knows Robin's past and freezes her and Luffy. In Water 7, home of the Galley-La shipwrights run by mayor Iceburg, the crew learns the Merry can't be fixed. The Franky Family steals their money, and Usopp, who refuses to abandon the ship, fights Luffy, loses and leaves the crew. Robin vanishes without a word. Masked figures attack Iceburg, and Luffy learns they're CP9, government agents undercover at Galley-La: Lucci, Kaku, Kalifa and Blueno. Robin gives herself up to protect her friends. During the Aqua Laguna, the sea train carries her and Franky to Enies Lobby, and the crew chases them on the Rocketman.

1. Behind the scenesThe ghost of the Merry

   During the Sea Train episodes, the anime shows a ghostly image of the Going Merry. It's a detail that exists only in the animation.

   source ↗
2. SetupThe Pluton blueprints

   Blueprints for an ancient weapon called Pluton have been handed down from shipwright to shipwright in Water 7. That name will matter.

   source ↗
3. ReferenceThe crew's first alliance

   The Galley-La foremen and the Franky Family fight alongside the Straw Hats. It's the first time the crew teams up with an outside group.

   source ↗