Zetsu (ゼツ) is the only member of the Akatsuki without a bespoke partner, the only nonhuman member, and Obito's right hand man. Originally, Kaguya created a shadow-like parasitic entity known as Black Zetsu (黒ゼツ, Kuro Zetsu) to manipulate her grandson Indra and his descendants throughout history for one of them to manifest a Rinnegan and free his creator. Black Zetsu succeeds with Madara, whom he deceived into believing that he had created the entity. White Zetsu (白ゼツ, Shiro Zetsu) was originally part of an army that Kaguya was assembling to fend off her kinsmen, consisting of humans mutated into drones after being assimilated by the Ten Tails during Kaguya's previous Infinite Tsukuyomi. Black Zetsu and White Zetsu operate in symbiosis, Black Zetsu occasionally argued with his easygoing host. As White Zetsu is an extension of the Shinju, he can merge into the ground or vegetation to quickly travel to a new location, and use spores to create clones of himself or whoever he touches.This makes Zetsu not only of use to the Akatsuki as a spy, but also to devour bodies of deceased Akatsuki members or those the organization does not want found. Another of the White Zetsu retrieved from the Gedo Statue, initially referred to as Guruguru (グルグル) due to the spiral-shaped pattern on his body, later named Tobi (トビ), served as an exosuit for Obito while the youth got used to his new body. After White Zetsu is killed by Sasuke during the Fourth Great Ninja War, Black Zetsu goes into hiding, later merging itself onto Obito to force the human to resurrect Madara.. Ultimately, once the Eye of the Moon Plan runs its course, Black Zetsu reveals his true identity and fuses himself onto Madara to convert the human into a new body for Kaguya to inhabit. Black Zetsu then reveals his role in the conflict between the Senju and Uchiha, while helping Kaguya fight Naruto and Sasuke. He is eventually ripped away from his creator when Naruto severs Kaguya's arm. As Kaguya is sealed away once more, Black Zetsu is thrown by Naruto into the forming moon so he would not make another attempt to free his creator.Tobi, having participated in the war by encasing Yamato to access his Wood-Style, before ejecting him once the Infinite Tsukiyomi is cast, crumbles away after the jutsu is canceled, with his former captive the only witness to his death.

As Kishimoto originally planned the Akatsuki to be a group of individuals with close to no human characteristics, he decided to make Zetsu half black and half white to emphasize his split personality. In the Japanese anime, Zetsu is voiced by Nobuo Tobita, who also voices the Tobi and the White Zetsu Army. In episode 134 of the English adaptation, Black Zetsu is voiced by Michael Sorich and White Zetsu by Brian Beacock, though both in the English Shippuden anime are voiced by Travis Willingham alongside Tobi and the White Zetsu Army.

Always wanted a poseable Zetsu figure, so I made one

Base figure was Itachi, hands and head were from Gaara, and the plant armor was from a Japanese PVC Zetsu

I repainted the hair, left side of Gaara's head and the left hand black