"Cat Burglar" Nami is a pirate and the navigator of the Straw Hat Pirates. She was the third member of the crew and the second to join, doing so during the Orange Town Arc. Later she betrayed the crew during the Baratie arc, but rejoined at the end of the Arlong Park Arc, after her past and her intention were revealed.
She is introduced as a thief and pickpocket who possesses skills to tell the climate and draw sea charts. At first, she is a subordinate of the fishman Arlong, but she is eventually freed of this service and permanently joins Monkey D. Luffy for her dream to write the complete map of the Grand Line.
Nami is depicted as an intelligent girl who has an obsession of obtaining money. She is able to use her three-sectioned staff and use her climate skills to create powerful attacks; the most prominent of these staff weapons is the Clima-Tact, in which she manipulates the climate to create weather-based attacks.