Roronoa Zoro

Roronoa Zoro (Roronoa Zolo in the edit version), also known as "Pirate Hunter" Zoro, is the protagonist from the One Piece game series. He is a former bounty hunter and the first member of Luffy's Straw Hat pirate crew. Zoro was being held prisoner in Shells Town by the corrupted Marine captain, "Axe-Hand" Morgan, and is awaiting his execution date.

He was charged for protecting a civilian girl from the marine captain's son's rabid pet wolf. Luffy respects him and offers Zoro a spot on his crew. Despite his initial refusal, Zoro agrees when Luffy keeps his word to retrieve his swords and free him from the firing squad.

He is a swordsman who uses up to three swords simultaneously, holding one in each hand and a third in his mouth. To fulfill a promise to Kuina, his deceased childhood rival, he aims to replace "Hawk-Eye" Mihawk as the world's greatest swordsman.

History
Since his youth, Zoro has trained to become a swordsman and was already strong enough to defeat opponents twice his size. The only opponent he couldn't defeat was his dojo master's daughter, Kuina, who he furiously challenged time and time again.

During their final duel together, they confide in each other their respective dreams to become the best swordmasters in the world, a goal which they both promise to fulfill. When Kuina unexpectedly dies, he is given Kuina's sword, Wadō Ichimonji, as a keepsake. In her honor, he develops his trademark three-sword style and promises to someday fulfill his part of their childhood promise.

Traveling the seas in search of Mihawk and making a living by hunting bandits and pirates, he becomes infamously as a bounty hunter. Eventually, he comes into conflict with a corrupt and draconian marine captain, Morgan, and his son Helmeppo. To prevent the harm of innocent civilians, Zoro allows himself to be incarcerated temporarily, while Morgan and his son plots to have him killed.

Zoro is saved from execution by Luffy in exchange for becoming his first crewman. At that point, Zoro makes it clear that he would turn on his captain if he ever stepped between him and his dream. However, Zoro grows fond of his crew and after several defeats in their defense, his priorities change and he convinces Mihawk to take him on as a student.