Luffy needs to use his Haki in a much refined manner, and that means a new Haki Power-Up is incoming. At the same time, Oda ...

While Haki is incredibly important in One Piece, many characters have made it to the Final Saga without it. That said, Haki ...

Luffy still has a far way ahead when it comes to his haki mastery. These One Piece characters outclass him in terms of Haki.