Zetsu is a ninja and also a member of the Akatsuki. His body seems to be made out of 2 beings. One is known as the Black Zetsu and the other is known as the White Zetsu.
Outside his body are very large plant like body parts, similar to those of a venus fly trap. His body is made up of 2 beings, a white half, and a dark half. His hair is a dark/murky green.