Sabo Ace's Friend

Fire Emperor" Sabo[10] is the Chief of Staff of the Revolutionary Army and is recognized as the #2 ranking officer in the entire organization, second only to Monkey D. Dragon.[2] He is the adopted brother of Luffy and Ace, and the half-brother of Sterry, the current ruler of Goa. He is the son of Outlook III and Didith.
He was born into a noble family in the Kingdom of Goa, but decided to run away and live in the Gray Terminal, eventually taking to the sea. There, he met Ace, and five years later, Luffy, who later began calling each other "brothers." Along with Ace and Luffy, Sabo dreamed of becoming a pirate, setting sail, and gaining freedom, and planned to set sail with his brothers at age 17. Then Sabo and his girlfriend, Daria, saw Ace and Luffy. Sabo then became the captain of the Revolutionary Army pirates, and Daria became a gardener. Then Daria went to the bathroom and discovered she was pregnant with her boyfriend Sabo's child and wanted to tell him.