Kū

is a synthetic human from Iwagakure. He was created by Ōnoki as a partial clone.

Personality
A mysterious man, he is very committed to his ambitions and will execute his tasks without hesitation, all in the goal of reshaping the world for "peace". He is shown fiercely loyal to his father/creatore, Ōnoki, growing irritable at his sudden disappearance, striking down one of his Akuta out of anger. At the same time, he refuses to stray from Ōnoki's goal of the least amount of bloodshed possible. Unlike his fellow artificial humans, Kū is shown more well-adjusted as a person, neither questioning who he is nor looks down on regular humans.

Appearance
Like important Iwa figures, Kū dresses in a green and red robe. He has shaggy brown hair reaching below his chin and covers his left eye while the rest of his hair reaches his mid-back. Like his father, he has a broad face with a large nose and thick eyebrows. Underneath, he wears a green flack jacket.

Abilities
Created and trained by the Third Tsuchikage, Kū is shown to be a very capable ninja, enough to face the Fourth Tsuchikage one-on-one. He also a skilled leader, proving to be very methodical and problematic as can effectively read the situation to decide how to act.

Nature Transformation
Apparently inherited his father's elemental affinity, Kū is highly proficient in the advanced nature transformation of Dust Release, which is a simultaneous usage of Earth, Fire, and Wind Release. With it, he can use the Dust Release: Detachment of the Primitive World Technique to disintegrate his targets. Like many Iwa-nin, Kū seems to specialise in Earth Release, able to use the Earth Release: Light-Weight Rock Technique to grant himself flight to move about as he pleases and also use the earth around him to attack his foes. He is also able to use an Iwagakure kinjutsu, Akuta, to create golems made from stone.

Physical Prowess
While mostly a schemer who operates from behind the scene, Kū is more than proficient in direct combat. Against Kurotsuchi, he showed noticeable taijutsu prowess, able to calmly defended himself from her attacks and likewise proficient in take-downs and body holds. He also is skilled in kenjutsu wielding a large cleaver-like blade with which he can strike down multiple targets with a single strike. He has considerable raw strength, able to strike a target as large as Akatsuchi through the air with enough force to shatter a massive stone column. He has blazing speed, able to quickly catch Boruto off-guard before subduing him.

Mitsuki's Disappearance Arc
Kū met with Kirara and Kakō in what appears to be some type of research facility for the production of Akuta. Later, feeling that his preparations were complete, Kū, Kakō, and some of his artificial soldiers successfully attacked and abducted Kurotsuchi. Later, when Akatsuchi and five Konoha genin came to Ōnoki for help in finding their lost ally Mitsuki, Kū surrounded them with his Akuta. He then revealed to the captured foes that he was, in fact, Ōnoki's son and working in league with the former Tsuchikage.

When Boruto confronted the Third Tsuchikage about this, Kū quickly subdued him. The old man then explain the nature behind his goal and voiced his desire not to hurt anyone, the genin made their move to escape. Kū quickly engaged in the fight, facing off against Akatsuchi. The fight quickly escalating, knocking over a massive column towards Ōnoki, who was narrowly saved by Boruto, who escaped with the elder. An enraged Kū then ordered his Akuta to retrieve Ōnoki.

Growing irritating at the abduction of his father, Kū had his soldiers send out more Akuta while insisting to keep their actions secret. He later finally met with Mitsuki. The boy asked about the essence of free will. Kū however noted that he can't truly answer that himself as an artificial human like Mitsuki and that Orochimaru, as Mitsuki's creator, was the best chance of him getting a straight answer. He did however note that Mitsuki betraying Konohagakure, an act of rebellion, is common among humans as a sign of maturing. He then went on to insist that the unique nature of Mitsuki's being would be instrumental in completing the Third Tsuchikage's plans to ensure lasting peace through the Akuta.

pt-br:Kū