Description of Ace's Death SceneAce's death scene takes place during the final, climactic moments of the Marineford War. After being freed from his shackles, Ace and Luffy fought alongside their allies to clear a path for their escape.

Akainu's Intervention: As the entire Whitebeard Pirates crew and their allies were retreating, Admiral Akainu (wielder of the Magu Magu no Mi - the Magma Devil Fruit) blocked their path.

The Provocation: Akainu intentionally hurled insults and disrespect towards Ace's captain, Whitebeard, calling him a relic of a bygone era. This provocation touched Ace's pride and deep affection for his foster father, causing him to stop and turn to confront Akainu.

Act of Sacrifice: While Ace and Akainu briefly clashed, Akainu noticed Luffy was momentarily vulnerable and aimed a deadly magma punch directly at him. Ace immediately lunged forward, using his own body to take the full force of the fatal magma punch meant for his younger brother.

Final Words: Akainu's punch created a massive, irreparable hole in Ace's body. In Luffy's arms, Ace uttered his final words:

He expressed his regret for causing so much trouble and for not being able to see Luffy achieve his dream.

He thanked everyone (especially Luffy, Whitebeard, and the pirate crew) for loving him, a demon's child (referring to Pirate King Roger).

Ace affirmed that he had no regrets about his life and that the people who loved him gave him a reason to live.

After speaking these words, Ace smiled and took his last breath, leaving Luffy in profound anguish.

Ace's death scene is considered one of the most tragic, emotional, and impactful moments in the entire One Piece narrative, profoundly influencing Luffy's character development and strength thereafter.