Eiichiro Oda's One Piece is a story filled with powerful individuals who represent various organizations, all centered around the protagonist, Monkey D. Luffy. Luffy aims to become the Pirate King in an era where the seas are ruled by powerful pirates and the Marines do their utmost best to stop them in their tracks.
So far, quite a lot of talented characters have appeared in the story and have made quite a name for themselves. At the same time, there exist those who train their mind and body to achieve heights that would otherwise have been impossible for them to reach.
10 Roronoa Zoro Surpassed Almost Every Swordsman Stronger Than Him
Roronoa Zoro's story in One Piece began in Shimotsuki Village in the East Blue. There, Zoro was unable to defeat Kuina and lost 2,001 times to her. However, Zoro's promise to Kuina is what keeps driving him and still does. Zoro has surpassed quite a lot of naturally talented swordsmen over the years and is gunning for Mihawk's throne as well. Although Zoro isn't ordinary, it is the effort he puts in that sets him apart from the rest and makes him special.
9 Even Without Genetic Augmentation, Sanji Surpassed His Brothers
Sanji is the biological son of Vinsmoke Judge, the leader of the Germa Kingdom. Along with his brothers, he was experimented upon before being born to give him superhuman powers. Sanji's mother, Sora, took a powerful drug that halted its progress for him and made him human. While the other kids were born with extreme power, Sanji was weak. However, he trained his mind and body and became just as strong as his siblings without the genetic augmentation. Thanks to all the hard work, his genetic augmentation bloomed later in Wano Country.
8 Monkey D. Garp Became The Strongest Marine Without A Devil Fruit
All powerful Marines are known to have Devil Fruits, especially those who hold the rank of an Admiral. While Garp was never an Admiral, he certainly had strength that surpassed theirs in his prime. Garp could fight the likes of Shiki and the Yonko without even having a Devil Fruit. His Haki was what made him extremely special and that power could only be made stronger through training. Without a doubt, Garp has trained extremely hard to become as strong as he is today.
7 Koby Has Become A Powerful And Capable Marine
Koby was once a pirate who was forced to work under Alvida in the East Blue. After being freed by Luffy, Koby joined the Marines and was later personally trained by Garp.
Under his intense training, Koby grew a lot and became one of the strongest Marine Captains in the story. After the timeskip, he's become stronger than ever, and one day, he will most likely make it to the position of Admiral just by his hard work alone.
6 Usopp Can Keep Up With The Rest Of The Crew
Usopp is one of the weakest members of the Straw Hat Pirates, but over the years, he's come a long way. His dream is to become a brave warrior of the sea, and it forces him to put himself in harm's way every now and then. At one point, Usopp was frustrated with himself over being unable to keep up with the rest of the crew. However, he's progressed a lot since then. Even when there are gifted people in the crew, Usopp is capable of keeping up with them all by working harder and smarter.
5 Nami Can Defeat Stronger Enemies Now
Just like Usopp, Nami is one of the weakest members of the crew but has continued to press forward and become stronger over the years. Nami has been studying the weather ever since she was young and that has given her an incredible understanding of every phenomenon. Using that in conjunction with her fighting abilities, Nami has been able to fight and defeat some of the strongest enemies.
4 Chopper Has Surpassed Almost All Doctors In The Story
Chopper was once a regular reindeer but after eating the Hito Hito no Mi, his life changed. Chopper was treated as a monster by humans who attacked him on countless occasions until Hiluluk finally took him in, followed by Kureha.
Under the latter, he learned everything about medicine and became an incredible doctor. Despite not knowing anything about the art and even blaming himself for poisoning Hiluluk, Chopper grew up to surpass all the doctors in the world.
3 Kuina Defeated All The Men At Her Dojo Despite Being Looked Down Upon
The daughter of Koushiro, Kuina was looked down upon by most people in her dojo simply because she was a girl. Even her own father believed she didn't have what it took to become a master swordswoman. Despite everything, Kuina defeated every single man who challenged her because she trained incredibly hard and was quite skilled. Even Roronoa Zoro lost to her 2001 times, showing how much effort she'd put in.
2 Shanks Took His Place Among The Four Emperors
Shanks rose to the position of Yonko six years before the current storyline of One Piece. All the other Yonko in the story have special powers, such as Whitebeard with the Gura Gura no Mi, Kaido as a Mythical Zoan Dragon, and Big Mom with monstrous power since birth. Yet, Shanks, a guy without any Devil Fruit and just one arm, was somehow able to enter the ranks of the Yonko, which was extremely impressive.
1 Luffy Ended Up Surpassing Both Ace And Sabo
Luffy grew up with Ace and Sabo on Mt. Corvo in the Goa Kingdom. Together, the three trained to grow stronger every single day, but Luffy was the weakest of the lot by quite a margin. After years and years of training, he finally managed to become one of the strongest pirates alive and surpassed both of his brothers. Currently, Luffy is strong enough to compete with the likes of the Yonko, showing the results of his hard work.