Zetsu

(ゼツ, Zetsu?) is the only member of Akatsuki to regularly act without a partner.

This is in part a result of his ability to merge with any object and quickly travel to a new location, a feat few other ninja are capable of.

Because of this ability Zetsu serves a variety of different positions in Akatsuki, such as a spy that observes and reports on battles of interest or a lookout during Akatsuki's meetings.
Being cannibalistic, he is often sent to dispose of bodies Akatsuki does not want found, mirroring the large venus flytrap that envelops his body.

Zetsu has a split personality, each occupying separate halves of his body. Zetsu's body is split into two different colors, his right side being black and his left being white.

Similarly, the two sides have their own personalities and knowledge bases, frequently leading to discussions and arguments between the two.