The former bounty hunter Roronoa Zoro is one of the most integral members of Luffy's Straw Hat Pirates on "One Piece." Here's a closer look at his family tree.

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. Born in the East Blue, Zoro is the son of Tera and Roronoa Arashi ...