John Giant

Vice-Admiral John Giant (ジョン・ジャイアント中将 Jon Jaianto Chūjō) is one of the marine officers in the Marine Headquarters. His name and rank are revealed in One Piece Yellow. He is the first giant to be revealed in the series however his race was revealed much later than his initial appearance.

Appearance
John Giant is a giant, and towers over regular soldiers by several times. He wears a red hat with the Marine's symbol on it, and a variation of the standard Marine coat with yellow colorings, red borders, and medals adorned on the left side. Unlike other high-ranking Marines, he wears his Marine coat with his arms in the sleeves. Underneath that, he wears an orange shirt, simple loose pants and boots. Overall, he appears to be a well decorated Marine.

He also wields a katana that fits his size, slung over his shoulder.

Abilities and Powers
John is a Giant, which grants him strength and endurance that is several times greater than that of an average human. He is a swordsman, with a katana that fits his size. However, his skills cannot be determined as he fought against the powerful Whitebeard but was quickly defeated.

Haki
It was stated that all Vice Admirals possess Haki, so John can also use the ability. However, he has not yet been shown using it.

Post Arlong Arc
He was first seen during the announcement of Luffy's first bounty. At that time he was giving a speech about maintaining "Justice."

Enies Lobby Arc
He was seen again, shouting orders after the Buster Call was signaled. When the signal was received a report was given directly to him, implying his high status at the headquarters, as well as the fact that he has the powers to command others of the same rank (via the five Buster Call vice-admirals).

Marineford Arc
When the execution of Portgas D. Ace was announced, John Giant reported to the summoning of the Marines to reinforce Mariejois. Three hours before Ace's execution, he is seen rallying the 100,000 troops in Marineford for the upcoming battle.

After the pirates began their advance when Whitebeard began his attack, John Giant tried to prevent them from entering into the plaza by attacking them with his sword. However, when Whitebeard himself confronted him, John Giant was quickly defeated by losing his balance from Whitebeard's tilt attack followed by a quake punch to the chest.

Major Battles

 * John Giant Vs. Whitebeard