Kakuzu

Kakuzu (角都) was an S-rank missing-nin from Takigakure and a member of Akatsuki who was partnered with Hidan. Kisame Hoshigaki jokingly referred to them as the Zombie Combo (ゾンビコンビ, Zonbi Konbi, English TV: Zombie Pair), due to the fact that, in differing senses, they could not die.