buggy

Age: 37 (debut); 39 (current)
Birthday: August 8
Height: 192 cm (6' 3½")
Affiliations: Buggy's Delivery; Shichibukai (former); Cross Guild; Roger Pirates (former)
Devil Fruit: Bara Bara no Mi (Chop-Chop Fruit)
Type: Paramecia
Bounty: 3,189,000,000 (previously; 15,000,000)
Buggy is the main antagonist of the Orange Town Arc and can be considered the secondary antagonist of the Loguetown Arc. He has since become a highly recurring character in the series.
He accidentally consumed the Bara Bara no Mi, which allows him to separate his body parts and control them independently, though it robbed him of the ability to swim. The abilities gained from this fruit also make Buggy immune to attacks from knives or swords; any such attack just separates him into his component parts.
Additionally, most of his body can fly through the air quickly enough to propel a man through a wall—except for his feet. However, even when separated, Buggy can still feel what each part feels. For example, when Luffy attacked Buggy, he separated his torso from his waist, only to find that Luffy was aiming for the crotch. This left him with a painful result. Also, when Buggy launched his hand out to pin down Zoro, Luffy stomped on it, causing tremendous pain. Buggy seems to require either a fixed distance from his detachments or keep them within his line of vision to manipulate them separately.
Besides his Devil Fruit abilities, he usually fights with three knives between his fingers. During flashbacks of his youth, he already used these three knives. He also has a blade hidden in his shoe and used a sword in Logue Town during his failed attempt to execute Luffy.
Marineford Arc:
Buggy's influence grew exponentially during the Impel Down Arc after he freed hundreds of powerful prisoners from Impel Down whose individual bounties are much higher than his own. After it was revealed that Buggy was once a member of the Roger Pirates, these prisoners came to heavily respect him and follow him wherever he went. Buggy's newfound authority created by his association with the Roger Pirates even attracted the attention of the World Government, who offered him a Warlord position. Buggy used this position to run a mercenary business called Buggy's Delivery, where he had authority over a large number of powerful mercenaries, including giants from Elbaf.
Levely Arc:
The Seven Warlords system has been dissolved, and Buggy is now an enemy of the World Government again. He can no longer operate outside the law as he pleases.
Wano Arc:
It is revealed that Buggy actually became one of the four emperors of the sea, alongside Blackbeard, Luffy, and Shanks. He starts an organization with two former warlords, Mihawk and Sir Crocodile, known as "Cross Guild." The Cross Guild puts bounties on marine soldiers, making the navy fear even civilians who could kill them.