Roronoa Zoro (ロロノア・ゾロ, Roronoa Zoro?) (Written as Roronoa Zolo in the 4Kids dub and FUNimation edited dub, as well as the European English translation and English manga) is a fictional character in the manga and anime series One Piece by Eiichiro Oda. He is a swordsman and the first member to join the Straw Hat Pirates.

Source: Wikipedia