Luffy Uses Haki In Marineford

: After the Haki burst, the Marines shifted their primary focus to Luffy, viewing him as a threat that needed to be eliminated immediately rather than just another rookie.

At this stage, Luffy's Haki was . According to experts on the One Piece Wiki , Conqueror’s Haki is a rare ability possessed by only one in several million people, allowing the user to overpower the resolve of others. At Marineford, Luffy did not yet understand the mechanics of Haki; it was triggered purely by his intense emotional distress and desire to save Ace. luffy uses haki in marineford