Monkey D. Luffy
The fourth season of the "One Piece" anime series was directed by Konosuke Uda and produced by Toei Animation. Like the rest of the series, it follows the adventures of Monkey D. Luffy and his Straw Hat Pirates. The first 17 episodes, dealing with Nefertari Vivi and the Straw Hats as they arrive in Alabasta to stop a civil war from happening, make up the arc. The remaining episodes make up the arc, in which the protagonists defeat Baroque Works and Nico Robin joins the crew. This season adapts the 18th to 24th volumes of the manga by Eiichiro Oda.