Growing up in the East Blue, Monkey D. Luffy's childhood was anything but ordinary. His bond with his brothers, Ace and Sabo, was forged through shared hardships and dreams. They weren't related by blood, but their brotherhood was stronger than most familial ties. Ace, the older of the two, initially despised Luffy for his naivety, but their mutual stubbornness eventually turned into respect. Sabo, the middle brother, came from nobility but rejected his oppressive upbringing, finding freedom with Ace and Luffy in the wild forests of Goa Kingdom. The three made a pact to set sail and become pirates, dreaming of lives unrestrained by the world's rules.
Tragedy struck when Sabo was seemingly killed by a Celestial Dragon's ship, leaving Ace and Luffy devastated. This event deepened Ace's resolve to protect Luffy, while Luffy, ever resilient, carried Sabo's dream alongside his own. Their shared grief and determination became the bedrock of their bond. Even after Ace's death at Marineford, Luffy's resolve only grew stronger, honoring his brothers' memories by pushing forward. The eventual reunion with Sabo, who had survived and joined the Revolutionary Army, added another layer to their story—proof that their bond transcended even death.