Nami

Height: 169 cm (5'6½”)
Position: Navigator
Bounty: 366,000,000 (previously; 16,000,000 and 66,000,000)

Nami is the third person to align herself with Straw Hat Pirates, and the fifth to actually join as an official member. Possibly one of the best navigators currently sailing the Grand Line, she has the ability to recognize and analyze even the slightest changes in the weather through sheer intuition, thus saving the ship and the crew from the very unstable Grand Line weather on multiple occasions.