Roronoa Zoro,^[20] also known as "Pirate Hunter" Zoro,^[9] is a main combatant of the Straw Hat Pirates, one of their two swordsmen, one of the Senior Officers of the Straw Hat Grand Fleet,^[4] and is publicly recognized as the right-hand man of his crew's captain Monkey D. Luffy.^[21][22] Formerly a bounty hunter,^[6] he is the second member of Luffy's crew and the first to join it, doing so in the Romance Dawn Arc.^[2]