エドワード・二ューゲート 

Overview

Edward Newgate, more commonly known as "Whitebeard", was the captain of the Whitebeard Pirates and was widely known as the "Strongest Man in the World" and, after Gol D. Roger's death, the "Man Closest to One Piece".

Before forming his own crew, Newgate was an orphan hailing from the island of Sphinx. During his tenure as a pirate, he was a known member of the legendary Rocks Pirates and later in life became one of the Four Emperors that rule over the New World, before his death in the Summit War of Marineford.

In his prime, Newgate was a rival to Gol D. Roger, and following Roger's death, was widely recognized as the strongest man in the world, a fact complimented by having the highest active bounty whilst alive, and the second highest bounty of any pirate in history. Due to his age and worsening health, it was not as powerful compared to his prime, but he could still negate the intangibility of Logia-based Devil Fruits. In the past, he was able to defeat Crocodile (though it is unknown if the former Warlord of the Sea had eaten his Devil Fruit by that point). During the Summit War, Whitebeard successfully inflicted significant damage on Akainu, whereas Marco, Vista, and Jinbe—highly skilled Busoshoku Haki users themselves—failed to do so.

He was an ally of Monkey D. Luffy and a central figure overall during the Marineford Arc.

He had the power to send incredibly powerful shockwaves through the air, creating cracks in the air itself in the process. These shockwaves possess devastating offensive might, being able to clash evenly with the Magu Magu no Mi, the Devil Fruit with the highest attack power out of all the Devil Fruits. He could use these shockwaves to quickly take down multiple enemies over a widespread area or take down a single target with terrifying effectiveness, even Giants. He could also use his shockwaves defensively, as their vast raw power could easily stop incoming attacks. He could also generate strong vibrations from his body that could easily shatter ice.

He could use his power to shake, rupture, and tilt the landscape itself. By striking at the general area with his quake powers, he could cause large earthquakes and, under the right circumstances, massive tsunamis. His quakes would cause serious damage and alterations to the surrounding landscape, destroying buildings, creating large crevices in the ground, and pushing up fragments of the ground into new rock formations. He could even "grab" the surrounding area itself and tilt it, described as making the entire sea tilt. 

Whitebeard could use his power to enhance his physical attacks by surrounding his hands and feet with concentrated quake bubbles. These quake bubbles would release a small but powerful shockwave on impact, greatly increasing the destructive power of his melee attacks. He could also surround the blade of his polearm with a quake bubble, greatly increasing its destructive power as well.

Soon after Whitebeard's death, his power was stolen by Blackbeard through unknown means.

Haki

Haoshoku Haki

Whitebeard possessed immense mastery in the usage of Haoshoku Haki. During his initial encounter with Kozuki Oden 30 years ago, their sudden clash created a notable effect similar to lightning and released a large burst. His Haoshoku Haki was displayed to a far greater extent against his longtime rival, Gol D. Roger, as their clashing Haoshoku Haki cracked the air, creating an effect akin to lightning and generating a shock wave that blew back everything and everyone on and near the island. Most notably, Newgate was one of the small "handful" of people capable of using the advanced application of "infusing" his attacks with Haoshoku Haki, which exponentially increased his attack power, with his naginata being shown emitting streams of black lightning-like energy which caused their clash to disperse the clouds nearby. Another example was his clash with Shanks which resulted in the heavens being split in two.

During the Summit War, he was on the verge of using Haoshoku Haki against some of the World Government's executioners to protect Portgas D. Ace but failed because of a sudden illness attack. He is capable of using this form of Haki in the video games One Piece: Pirate Warriors 2, 3 and 4 as well as One Piece: Burning Blood.

Kenbunshoku Haki

Whitebeard was an extremely skilled user of Kenbunshoku Haki. It was first shown 30 years prior after both he and the Whitebeard Pirates shipwrecked in Wano, as he could sense Oden coming from a vast distance towards them, and his overall strength. He was even able to sense and counter Ace (when he was still new on the ship and was attempting to kill Newgate) while sleeping. In the bay of Marineford, he predicted Crocodile's sudden attack but did not move, knowing that Luffy would block it. However, due to both his age and worsening health, he failed to predict Squard's betrayal and thus got injured, something which, according to Marco, was totally unexpected from the Emperor.

Busoshoku Haki

Whitebeard was an immensely skilled user of Busoshoku Haki, which he could imbue his weapon Murakumogiri with. Two decades ago in his prime, he was shown clashing evenly with the samurai Kozuki Oden who was a powerful Busoshoku Haki user in his own right. Whitebeard could also utilize the advanced technique of projecting Haki out from his blade; this was shown during his fight with Roger where the duo's weapons met in a powerful clash without even making contact.

In the anime, when Whitebeard used advanced Busoshoku Haki, it is shown as a red-colored flowing aura.

Due to his age and worsening health, it was not as powerful compared to his prime, but he could still negate the intangibility of Logia-based Devil Fruits. In the past, he was able to defeat Crocodile (though it is unknown if the former Warlord of the Sea had eaten his Devil Fruit by that point). During the Summit War, Whitebeard successfully inflicted significant damage on Akainu, whereas Marco, Vista, and Jinbe—highly skilled Busoshoku Haki users themselves—failed to do so.

Weapons

Whitebeard wielded a gigantic naginata called Murakumogiri, one of the 12 Supreme Grade Blades. He was immensely skilled with the blade even in old age. He could use Murakumogiri to fight off countless powerful Marines in Marineford, including Marine Admirals, and during his prime, he also clashed with Kozuki Oden who was one of the strongest samurais of Wano. When he was a child, he had a much smaller and less well-crafted spear made up of a simple knife bound to a pole.