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

As a master of Three Sword Style, a swordsmanship style which he created during his childhood training