One Piece: The Half-Blood Ninja Who Hides on the Straw Hat Ship

Xi Yan, a half-Uchiha and half-Senju, shone brightly during the Second Shinobi World War. On his way to the Land of Water for a mission, he unexpectedly traveled to the world of One Piece and encountered a sea train bound for Enies Lobby! On this speeding train, Xi Yan met a boy carrying a destiny. Luffy: You're a ninja? Xi Yan: Yes. Luffy: Be my crewmate! Xi Yan: Sure... Since I'm here, I might as well join. Invited by Luffy, Xi Yan chose to join the Straw Hat Pirates and adventure with them. Using his power, he helped his crewmates rescue Robin and protect the ship spirit, Merry! Merry: Xi Yan, what's that? Xi Yan glanced at Moria and thought, "That's a spineless coward who only knows how to rely on external things." ...At Marineford, the massive Susanoo ravaged Marine Headquarters, showing the enemy what true power is! Sengoku: Damn it, this guy is just a ninja, how does he possess such immense power?! Kizaru: These new recruits are terrifying! Akainu: You evil pirate brat, I'll personally... Xiyan: Come on, let's fight to our hearts' content!