Portgas D. Ace is one of One Piece's most loved characters. Introduced for the very first time towards the end of the Drum Island arc, Ace went on to make a huge impact in the series, especially in the first half of the story. He made his full debut during the Alabasta arc, where it was revealed to the fans that he was Luffy's older brother. From there onwards, Ace started growing gradually in the background.