How Haki Works In One Piece: Pirate Warriors 2Omega Force added Haki in One Piece: Pirate Warriors 2. Conqueror’s Haki knocks down a bunch of small fry enemies nearby your character. As your level rises, the range increases. Armament Haki buffs your character’s attack and defense so you get a huge power boost. Observation Haki gives you a speed boost and makes attacks combo into each other. Each character has a different kind of Haki. For example. Luffy has Conqueror’s Haki, Zoro has Armament Haki, and Enel has Observation Haki.