Powers: Ate the Gum-Gum Devil Fruit, turning Luffy into a rubber man. This grants him the ability to stretch his body.
Weaknesses: Unable to swim as a result of eating the Devil Fruit.
Bio: Monkey dreamt his whole life of becoming a pirate. That dream was seemingly crushed when he ate a Devil's Fruit as a child. He became a "gummi man" but lost the ability to swim (or ever being able to).Luffy grew up on Dawn Island in Windmill Village located in East Blue. He was inspired to become a pirate like his idol, Red Haired Shanks. Luffy constantly wanted to join Shank's crew but was denied because he was a kid. Completely by accident, Luffy ate the Gum-Gum Devil Fruit that Shanks had brought back from the Grand Line. Luffy was nearly killed by Higuma, the mountain bandit, by throwing him into the sea. He was saved from the local sea monster by Shanks, but he had lost his right arm in the process.
Before Shanks left, Luffy swore that one day he'd have a crew of his own and become king of the pirates. Suddenly, Shanks placed his straw hat onto Luffy's head with the promise he would return it after he became a great pirate.
But he showed everyone that said he would never be a pirate when he set off on a journey to find a pirate crew and the greatest treasure of all time.Luffy's grandfather, Monkey D. Garp, returned and took Luffy to live with Curly Dadan, and Portgas D. Ace, who Garp said would be his brother. It took a while for Luffy to earn Ace's trust, but he soon became brothers with both Ace and Sabo, a local boy who dreamed of becoming a pirate along with Ace and Luffy. Sabo saved Luffy and Ace from the Bluejam Pirates by returning to his family, but he was seemingly killed as he tried to leave Dawn Island on his own when his raft was fired upon by World Nobles. Luffy and Ace spent the next few years training to fight so they could train to be stronger than anyone. Ace left the island when he turned 16, then Luffy left from Dawn Island a year later when he was 17. As he left, he defeated the sea monster that took Shanks' arm with a single punch.