Nami and Nico Robin are the only two female members of the Straw Hat Pirates, but they have always been a fundamental part of Luffy's adventures in One Piece. A stunning cosplay set by the twins Libby and Tess Yost shows how good the two pirate women would look in the traditional Japanese clothes worn by the people of Wano. Nami appeared at the very beginning of One Piece's story, becoming the second person to join Luffy's crew, right after Zoro. She earned her nickname "Cat Burglar" due to her obsession with treasure and her seductive manners, but she is also one of the best navigators in the world and proved her worth to the Straw Hats many times over the course of their adventures. Robin, on the other hand, debuted as an enemy of the crew, as part of the Baroque Works organization, led by Shichibukai Mr. Crocodile. She joined Luffy because Robin is running away from the World Government, as the last survivor of the scholars of Ohara, who went close to discovering the mystery of the Void Century. Since then, however, she grew strong bonds with the rest of the Straw Hats and considers them her family. She is a valued historian and archaeologist, and the power of her Hana Hana no Mi Devil Fruit is a great resource in battle.