Portgas D. Ace, born as Gol D. Ace and nicknamed “Fire Fist” Ace, was the sworn older brother of Luffy and Sabo, and the biological son of the late Pirate King, Gol D. Roger, and Portgas D. Rouge. Ace was adopted by Monkey D. Garp, as had been requested by Roger before his execution. Ace was the 2nd division commander of the Whitebeard Pirates and one-time captain of the Spade Pirates.
Hunted by the World Government for his lineage, Ace was captured and sentenced to death, which resulted in the Summit War of Marineford, an all-out clash of powers; Whitebeard‘s forces against the Marines and Seven Warlords. Ace was freed, but he sacrificed his life to protect Luffy from Marine Admiral Akainu.