Most of the Straw Hat Pirates in One Piece enjoy a good fight, but their navigator Nami is an exception to that rule. In most situations, she prefers to use her wits, and if necessary her feminine wiles, to outsmart opponents.
That said, Nami's knowledge of the weather has made her a formidable fighter when she chooses to be, thanks to her signature weapon, the Clima-Tact. While it's played a big part in getting Nami to where she is now, many fans overlook this unique and useful device.
One Piece: What is CP0 Doing in Wano?
During the earliest parts of One Piece, Nami is not much of a fighter. While she wields a bo staff, she rarely uses it, preferring to let Luffy and the other Straw Hats protect her. Before the Straw Hats reached the desert kingdom of Alabasta, Nami asked Usopp to make her a new weapon. The result was the Clima-Tact, a three-piece staff that can affect the weather. Nami, whose experience as a navigator makes her a genius at predicting weather patterns, is able to use the instrument especially well.
Over the course of the series, the Clima-Tact goes through many incarnations, gaining power and utility with each upgrade. The mechanism for its use, however, remains largely the same. The Clima-Tact can emit balls of cool or hot air, as well as balls of electricity. By combining these balls, Nami can create an assortment of meteorological phenomena. These include generating mirages, pressurized air, fog, clouds, rain, and most devastating of all, lightning.
Usopp originally misunderstood Nami and stocked the Clima-Tact with a bunch of useless party tricks, almost similar to a magician's wand. Nami used her own ingenuity to create weather techniques that Usopp had never considered, and did so to defeat the
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