Karma

Karma is an infamous New World pirate who allied himself with Whitebeard.

Appearance
Karma is a medium-sized man whose most distinctive traits are the octopus he wears on his head, shoulders and back like a head covering and his six arms. He has a red circle right in the middle of his forehead and a black goatee. He wears a striped shirt with ripped sleeves, a standard pirate's sash and loose pants similar to Buggy's.

Personality
Not much is known about Karma's personality. However, since like his allies he refers to Whitebeard as "Pops", and came to Marineford in order to save Ace, it might be assumed that he has a strong bond with the Whitebeard Pirates.

Abilities and Powers
Karma is a fearsome pirate who has managed to make himself an infamous reputation in the New World, and to ally himself with Whitebeard.

Weapons
With his multiple arms, Karma is capable of wielding a total of six sabers, similarly to Hatchan or Onigumo. It might be assumed that he's a capable swordsman, and the fact that he can use six weapons at the same time helps him greatly in battle.

Past
Some time prior to the current storyline, Karma became a known pirate in the New World, and allied himself with Whitebeard.

Marineford Arc
When Portgas D. Ace was to be executed at Marineford, Karma and his crew joined forces with the Whitebeard Pirates to save him. He was seen attacking the Marines out of the bay with his fellow allies, and later managed to enter it.

Major Battles

 * Whitebeard Pirates and their allies vs. the Marines and Shichibukai