Nami is a slim young woman of average height with orange hair and green eyes. Many characters seem to consider her to be an attractive woman. She has a black tattoo on her left shoulder.

Nami is one of the smartest of the Straw Hats. Nami can be seen ordering the crew to lift the mast or draw the sails. If she deems an island dangerous, she will often try to convince Luffy to not go. Nami has been deeply affected by her adoptive mother's death and Arlong's enslavement and imprisonment of her. 