Cancer was a later addition to the Zodiac. Another background member of the team, Cancer said nothing and stayed mostly behind the scenes.
Cancer possessed superhuman strength, wore an armored crab like costume, with pincers on his hand that he used to crush his enemies with and carried a Zodiac teleportation device. Cancer was more of a fill in character, said nothing and was mostly behind the scenes. He was killed with the rest of the Zodiac by Weapon X.