Ep 421. The Friends' Whereabouts: A Negative Princess and the King of Demons

In One Piece season 7 episode 421, titled "The Friends' Whereabouts: A Negative Princess and the King of Demons," the Straw Hat Pirates continue their search for their missing comrades. While navigating through the treacherous waters of the New World, they encounter a mysterious island where the inhabitants have the unique ability to manipulate shadows.

As they explore the island, they come across a young princess named Mansherry who has been captured by a group of pirates. She possesses the ability to heal any injury or ailment, making her a valuable asset to whoever controls her. The Straw Hats make it their mission to rescue her and defeat the pirates.

Meanwhile, Sanji and Caesar Clown, who were separated from the rest of the crew, are being held captive by the powerful pirate Doflamingo. Doflamingo reveals his plans to take over the Kingdom of Dressrosa and seeks to use Caesar's scientific knowledge to create an army of artificial devil fruit users.

Back on the island, the Straw Hats discover the true nature of the inhabitants' ability to manipulate shadows. They meet a mysterious man named Gecko Moria who was once a notorious pirate known as the "King of Demons." He reveals that he used to control a powerful army of zombies using his shadow-manipulating ability. However, his army was defeated by the pirate Blackbeard, leaving Moria in a state of depression and defeat.

As the Straw Hats and Moria join forces to rescue Mansherry, they come across a new enemy who possesses the power to control shadows even more powerfully than Moria. This enemy seeks to capture Mansherry to use her healing ability to resurrect the dead and create a massive army of zombies.

Meanwhile, on Dressrosa, Luffy's brother Ace's former friend and crewmate, Sabo, makes a surprise appearance and reveals himself to be alive. Sabo explains his journey after the events of the Marineford War and his search for the Mera Mera no Mi devil fruit, which was once owned by Ace and is now up for grabs in the coliseum.

As the two storylines converge, the Straw Hats and their allies face off against a powerful enemy with the fate of the island and its inhabitants at stake. Will they be able to defeat their foe and rescue Mansherry? Find out in "The Friends' Whereabouts: A Negative Princess and the King of Demons."