Omega 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.
Some characters like Nami don’t have Haki. They have Style Actions and there are two kinds of those in One Piece: Pirate Warriors 2. Technical actions let you dodge an attack at the last minute. Attacker actions give characters something like Super Armor. Franky is an attacker style character while Robin and Nami are technical characters.
One Piece: Pirate Warriors 2 comes out on March 20 for PlayStation 3 and PlayStation Vita.
