Rayleigh was a Haki monster with immense power, feared even by the Four Emperors in his prime. Sengoku and Whitebeard were also formidable users of Haki, rivaling even the Pirate King, Roger ...

Ryu Ryu no Mi, Model ... with each having incredible powers to offer to the user. Conqueror's haki is a powerful ability only few can use. Here are some One Piece characters who must have it ...