One of the factors that makes One Piece a beloved manga series is the diverse and unique personalities of its characters, crafted meticulously by the author Eiichiro Oda. Although there are hundreds of characters appearing throughout the story, each character has their distinctive traits and personalities, making them memorable and endearing to the audience.
Below are the most prominent unique characters in One Piece
7. Roronoa Zoro

Zoro is a powerful swordsman and a key member of the Straw Hat Pirates, but he is also the most unique person in the group. When Zoro isn’t training, he is often seen sleeping or simply drinking sake with anyone who happens to join him. It’s hard to find any character in One Piece who sleeps as frequently as Zoro.
However, Zoro’s frequent naps could be the reason he often gets lost, as he never takes the time to check where he is before falling into a drunken stupor.
6. Aokiji

Every character playing the role of a Marine in One Piece has their own sense of justice. For Aokiji, his version of justice is known as ‘lazy justice.’ This means that while he is willing to capture anyone deemed a threat by the government, he is also known for avoiding any actions that would require him to exert himself excessively.
Aokiji is also portrayed as a laid-back character, often appearing indifferent or even reluctant during battles.
5. Big Mom

Big Mom’s obsession with food has led her to become a formidable Empress. Her primary focus is on consuming delicious treats, especially when Luffy forces her to act. Even when the Straw Hat Pirates invade Whole Cake Island, Big Mom is preoccupied with planning a feast for herself while simultaneously engaging in battle.
If Big Mom were more ambitious and focused on conquering the world, she would undoubtedly be a significant threat, considering her size and strength.
4. Kaido

When Kaido first appears in the series, he is depicted as a man who attempts to commit suicide by jumping from a sky island to the ground below, seemingly tired of his life. Instead of using his immense strength to destroy everything in his path, Kaido has a rather unique tendency to seek out death, which makes him an unconventional antagonist.
Initially, he is often seen as a heavy drinker, using alcohol to forget his sorrows, and he will attack anyone who dares to interrupt him. Kaido is strong to an absurd degree, to the point where he does not even feel the need to restrain himself in battle.
3. Gecko Moria

When Luffy and the Straw Hat Pirates first arrive at Thriller Bark, they soon discover that the entire island is under the control of Gecko Moria, a member of the Shichibukai. However, Moria seems disinterested in the notion of being a villain.
The reason this Shichibukai is so unique is that he possesses the Kage Kage no Mi power, which allows him to manipulate the shadows of others, using them to create an army of zombies. With a ready-made army at his disposal, Moria often appears to be lethargic, doing very little until he feels threatened.
2. Kizaru

Kizaru is one of the fastest characters in the series, possessing the ability to move at the speed of light. His powers can make it seem like he is a carefree person who is always moving and effortlessly dodging attacks, making it hard to keep track of his energy levels. However, he is not as relaxed as he appears, as Kizaru often finds himself in challenging situations, especially when facing off against the serious Admiral Akainu.
During battles, if necessary, Kizaru will exert minimal energy to swiftly counterattack, making him a relentless opponent on the battlefield.
1. Enel

Enel considers himself the god of the sky island. His lightning powers allow him to strike down anyone who does not obey him. When combined with his Observation Haki, Enel can attack from anywhere on the island. As a result, he spends most of his time in the Skypiea arc lounging on a throne and enjoying fruit, only occasionally bothering to confront those who challenge him.
Even when Luffy eventually defeats him, Enel simply floats away to the Moon, where he can continue to act as a god, something he has always aspired to become.
According to Gamerant