"Cat Burglar" Nami[11] is the navigator of the Straw Hat Pirates and one of the Senior Officers of the Straw Hat Grand Fleet.[4] She is the third member of the crew and the second to join, doing so during the Orange Town Arc.[19] She is the adoptive sister of Nojiko after the two were orphaned and taken in by Bell-mère. She was formerly a member of the Arlong Pirates and initially joined the Straw Hats so that she could rob them in order to buy back her village from Arlong.