Luffy didn’t know what he had done. He didn’t feel the Haki. He didn’t understand the fear in the Marines’ eyes, the whispers of "Monster" , the sudden space clearing around him.
Historical Context: Other Times Luffy Used Haki Pre-Timeskip
Doflamingo cackled from atop a debris pile, pink feathers fluttering. "Ooh~! The little monkey has the king’s color! This war just got interesting!" luffy haki in marineford episode
And then—silence.
During the Marineford arc of the One Piece series, Monkey D. Luffy showcases his impressive Haki abilities. In episode 399, Luffy uses his Haki to sense the emotions and auras of those around him, allowing him to anticipate and react to the attacks of his enemies. Luffy didn’t know what he had done
The plaza became a theater of chaos.
"And you all just watched him do it."
His eyes weren’t dark anymore. They were clear. Sharp. Red.