Sekiei

is an artificial human from Iwagakure, who was created by Kū.

Personality
Sekiei is a very childish individual. He shows a very light-hearted nature, as he enjoys drawing randomly and is very open with his thoughts. He is very fascinated by the emotional natural and group interactions of human beings.

Appearance
Sekiei is a young man with brown, bowl-cut hair and pale skin. He has large, green, pupilless eyes and the lower half of his face is concealed by bandages. He wears a purple tunic over a black bodysuit, his hands also being covered by bandages.

Abilities
Being created with special powers and jutsu, Sekiei was implanted with Explosive Clay, allowing him to use simultaneously use Earth and Lightning Release to use Explosion Release. Utilising the kekkei genkai to use C1, Sekiei can create a variety of clay insects that explode.

Mitsuki's Disappearance Arc
Sekiei first appears at the entrance to Konohagakure, supporting Kokuyō as he attacks Saō and Uō. He leaves both men incapacitated before fleeing with Mitsuki. When the genjutsu on Yurito was broken, Sekiei's C1 detonated in an attempt to kill him, but Yurito survived, though was left in a critical condition. On their way back to the Land of Earth, Sekiei took an open liking towards Mitsuki as an artificial human. He began talking about how Mitsuki's being would help in advancing their goal, only to be interrupted by Kokuyō, who didn't trust Mitsuki with such information. As they approached the Land of Stone's boarder, Kokuyō noticed that they were being pursued by Konoha-nin. Sekiei was sent ahead with Mitsuki while Kokuyō engaged the pursuers.

When they learned that two Konoha-nin made it past Kokuyō, Sekiei left Mitsuki with the two Akuta while he faced the enemies. Sekiei was intrigued by the Boruto Uzumaki and Sarada Uchiha's fixation on retrieving their "friend" Mitsuki. Despite this, he quickly went to work to kill them. As his Explosive Clay proved to powerful for the Konoha-nin, Boruto summoned Garaga to aid. While the giant snake initially refused to help, ultimately began attacking Sekiei on the grounds of proving his might. Sekiei prepared a counter-attack, by his body suddenly gave out in strength. Luckily, he was saved by the timely arrival of Mitsuki. Mitsuki then made his intentions clear joining the artificial men by striking Boruto hard with his Lightning Release, thus earning Kokuyō's full trust as they departed from Boruto and Sarada.

Trivia

 * means "quartz".