In One Piece,the title of an emperorof the sea is proof of dominance on the sea, and it is one of the factors responsible for the balance of power on the Grand Line. To be an emperor in the series, you must carve your name into history with impossible or earth-shattering moments that no one can forget.
One Piece The Most Important Person for Each Straw Hat
Here is the most important person for each Straw Hat and their impact on the crew’s journey, shaping their dreams, strength, and resolve.
Each emperor does not just claim power but has to prove it, even though they have a coward among them. If we want to understand what it truly means to be an emperor of the sea, we have to look at the feats that made them superior to other pirates.

The Red-Haired Emperor
No other character or emperor has ended a war simply by showing up. While the fight between the Whitebeard pirates and the Marines tore the world apart in Marineford, Shanks stepped in and forced both sides to step down.
Even Blackbeard, who had just claimed the Gura Gura no Mi, chose to retreat rather than challenge him. His interference prevented further casualties, showing that his influence extends beyond his crew, and he is respected and feared even by powerful figures in the series.

Also, before reaching Marineford, he intercepted Kaido, who would have turned the war into a bloodbath. How exactly he did that remains a mystery; hence, the fact thatShanks stopped the strongest creaturein the series speaks volumes.
King Of Beasts
Kaido ruled over Wano for over two decades and built an army of Beast Pirates with SMILE fruits. Beyond Kaido’s pirate crew, he survived countless executions, reinforcing the idea that he was a nightmare and simply the strongest before Luffy defeated him.
The fact that Luffy defeated Kaido can also be seen as a feat because Kaido pushed him to awaken his devil fruit. In this way, Kaido’s defeat signaled the dawn of a new pirate era.

Moreover, long before he was an emperor, Kaido was part ofthe Rock Pirates, and the World Government had to act quickly to erase the group from history. Alongside Whitebeard, Big Mom, Captain Rocks D Xebec, Kaido was part of an era-defining event at God Valley.
The Queen Of Totto Land
As a child, before Big Mom could even understand her strength, she killed Jorul, one of Elbaf’s oldest and most respected giants, during a hunger-fueled rampage. Fast forward to her time as an emperor, she tanked Law’s Punctured Wille, Kid’s Damned Punk and multiple assaults fromthe two supernovas at Onigashimaand kept getting back up.
Even after her defeat at Onigashima, no one is convinced she is dead. Let us not forget Big Mom destroyed cities, ripped apart ships and nearly ripped Luffy’s crew apart at Whole Cake Island, and she was not even in her right mind.

Also, she was part of the Rocks Pirate crew that only housed the strongest pirates before Monkey D. Garp and Gol D. Roger defeated them at God Valley.
4Whitebeard
The Man Who Shook The World
He was referred to as the strongest man in the world, especially during the era of Gol D. Roger. During his prime, Whitebeard foughtthe Pirate King, and the battle was so insane that their weapons never touched - just the shockwaves from their haki-infused blows tore apart the sky.
Whitebeard was also part of the Rocks Pirates with Big Mom and Kaido, who used to be emperors and beasts in their own right. Even as a sickly old man, Whitebeard commanded an army at Marineford, and he endured many wounds during the war; and when death finally came for him, he died standing.

One Piece: Every Strong Haki User, Ranked
The strongest haki users in One Piece are revered for their power and have clashed against powerful opponents on the sea.
Perhaps his most remarkable feat came during his last moments in Marineford, and the seconds before his death were one of the most important moments in One Piece history. With his dying breath, he confirmed that the One Piece was real, setting off a new era of piracy, thus ensuring that Roger’s legacy lives on.
3Monkey D. Luffy
The Straw Hat Captain
Luffy has many great featsas the protagonist in the series, and the most recent one was defeating Kaido, which cemented his status as an emperor of the sea. At Onigashima, he awakened Gear 5 and turned the battlefield into his playground against the strongest man in the world.
Luffy’s altercation against the World Government has been going on forever, and if there was a single moment when the world should have realized Luffy was destined for something greater, it was the Enies Lobby assault to save Nico Robin. Similarly, Luffy punched a Celestial Dragon at Sabaody, even when they warned him that the consequences were dire.
He survived Impel Down, broke out many prisoners and made it to the Marineford War to stop his brother’s execution. After Marineford, Luffy, even in his grief, broke into Marineford the second time and rang the Ox bell to declare that he would return.
The Lucky Rise Of A Clown
Buggy might be the greatest fraud in the One Piece world, and he didn’t need to be the strongest, but he let the world believe he was. His true powers are luck and cowardice, but he is never to be mistaken for a fool.
Post Marineford, with nothing but his reputation as Roger’s former crewmate, an alliance with the prisoners from Impel Down, and his ability to be at the right place at the right time, the World Government, made him a warlord of the sea. The emperors are the peak of piracy, and somehow, Buggy became an emperor when Crocodile and Mihawk formed the Cross Guild.
How? Buggy’s ridiculous luck once again put him in a position of power when the World Government assumed he was the mastermind behind the Cross Guild. In other words, the coward Buggy outlived Kaido and Big Mom, becoming an emperor in their place.
1Marshall D. Teach (Blackbeard)
The Emperor Of Chaos
One can laugh at Buggy’s cowardice and marvel at Luffy’s resilience, but Blackbeard is the most dangerous of them all. No one thought it was possible to have two devil fruits, but Blackbeard became the first man to wield them at once.
Before becoming an emperor or warlord, he defeated the Whitebeard Pirate’s top commander, Portgas D. Ace, and instigated the Marineford War. Blackbeard stole Whitebeard’s empire by crushing the remnants of his crew in the Payback War and became an emperor.
Blackbeard has the most dangerous crew in the series; they all have formidable devil fruits. For an unknown reason, one of the devil fruits was used to copy the face of one ofthe five elders, St. Jaygarcia Saturn. Every move he makes is calculated, and he will be there when the final battle comes.
7 One Piece Arcs With Best Fights
From emotional duels to era-defining clashes, these 7 One Piece fights stand among the best.