Portgas D. Ace

Portgas D. Ace, born as Gol D. Ace and nicknamed "Fire Fist" Ace, was the biological son of the late Pirate King, Gol D. Roger, and Portgas D. Rouge, as well as the adopted older brother of Luffy and Sabo. Ace was adopted by Monkey D. Garp, as had been requested by Roger before his execution.Ace was captain of the Spade Pirates before being recruited into the Whitebeard Pirates and becoming its 2nd division commander. He ate the Mera Mera no Mi, giving him the power to transform into and manipulate flames.

After Blackbeard, a member of his division, committed the unforgivable crime of murdering a crewmate and fleeing, Ace went on a quest to hunt him down. When Ace finally found Blackbeard, though, a heated duel resulted in Ace's defeat, allowing Blackbeard to turn him in to the World Government. Worried about his lineage and wanting to make an example, the Marines sentenced Ace to death, which resulted in the Summit War of Marineford, an all-out clash of powers between Whitebeard's forces and the combined might of the Marines and the Seven Warlords. Ace was freed, but before he could escape Marineford, he sacrificed his life to protect Luffy from Admiral Akainu.

Ace's death ultimately proved to be the catalyst leading to Luffy training for two years to become strong enough to protect his friends, paving the way for the second half of the series. His reincarnated Devil Fruit would eventually be consumed by his sworn brother, Sabo, ensuring that his will would live on.

Ace was first shown during the Drum Island Arc, but only got formally introduced in the Arabasta Arc, where he acts as a brief ally of the Straw Hat Pirates. He is a central figure during the whole Summit War Saga. He is also the protagonist of Ace's Great Blackbeard Search Cover Page Serial.