Sabo

Sabo : is the Chief of Staff of the Revolutionary Army, and is recognized as the "No. 2" of the entire organization, being directly after Dragon himself in terms of command, and the adopted brother of Luffy and Ace as well as the son of Outlook III.

He was born into a noble family in Goa Kingdom but decided to run away and live in the Gray Terminal, eventually setting out to sea on his own. 12 years before the present storyline, he was a childhood friend of Ace, and eventually Luffy as well, to the point where the three considered themselves to be "brothers", swearing an oath of brotherhood over sake. Along with Ace and Luffy, Sabo's dream was to become a pirate so that he could set sail and achieve freedom, and made plans with his brothers to set sail at age 17.

Despite this, Sabo decided to set sail before Ace and Luffy, and his boat was destroyed by a Celestial Dragon moments later. Sabo was believed to have died from this event, but survived and joined the Revolutionaries. He is the second user of Mera Mera no Mi after he won in the Corrida Colosseum.

Logo Credits to : 

(c) Eiichiro Oda