Jozu

Jozu is the commander of Whitebeard's 3rd division.

Appearance
Jozu is a big, gruff, heavily armored man. The armor he wears is similar that to a samurai, with bolted shoulder pads. Jozu has a long face with stripe-like patterns for a beard and hairstyle. His legs are relatively thin, in comparison to his muscular arms. He appears to look angry and battle-hardened, and keeps his arms crossed at most times.

Abilities and Powers
As the commander of the third division of the Whitebeard Pirates, Jozu has authority over the lower-ranking subordinates.

Devil Fruit
Jozu apparently ate a Devil Fruit that allows him to turn his body into pure diamond. In this form, he is completely invulnerable to all slashes, including those sent by Mihawk.

Jaya Arc
Like Marco, He first appeared as a background character but unlike Marco, he did not get any dialogue. It wasn't until later, that he gets identified by name and role in Whitebeard's crew.

Post Enies Lobby Arc
Like Marco he displayed a knowledge of what would happen when Shanks boarded their ship and commented on how Shanks' spirit was as strong as ever.

Marineford Arc
Jozu has recently shown up at Marineford with the rest of the Whitebeard Pirates and their allies from the New World. Including him and Marco, all other division commanders are ready to battle.