Cancer

Cancer is a Marine vice admiral.

Appearance
Cancer is a man with slicked-back hair, sunglasses, and a cigar in his mouth. He wears attire standard for a high ranking Marine.

Abilities and Powers
As a Marine vice admiral, Cancer is capable of commanding a Buster Call alongside other vice admirals. He also has authority over lower-ranking subordinates.

Haki
It was stated that all vice admirals possess Haki, so Cancer can also use the ability. However, he has not been shown using it.

East Blue Saga
Cancer was first seen sitting next to Stainless at the meeting about Luffy's first bounty.

Jaya Arc
He attended the meeting held at Mariejois to discuss Crocodile's Shichibukai replacement. Doflamingo used his body manipulation ability to make Vice Admiral Mozambia and Vice Admiral Stainless fight each other. He wanted to stop Mozambia, but Doflamingo's manipulation was too strong.

Marineford Arc
Cancer is seen behind Stainless and Doberman, with the other fellow vice admirals lined up and ready to fight the Whitebeard Pirates. Later he was seen alongside Tsuru, shocked when it was revealed that the Whitebeard Pirates had another ship at the bottom of water.