Shin Uchiha

is a shinobi, allegedly from the Uchiha clan. He has shown a desire to eliminate Sasuke Uchiha and revive the Akatsuki alongside his son.

Personality
Shin loathes Sasuke Uchiha and plans to kill him for both murdering Itachi Uchiha and "bringing shame to the Uchiha clan". To achieve that goal, he is willing to sacrifice innocent bystanders like Sasuke's daughter, Sarada Uchiha, in pursuit of his goals to eliminate Sasuke and revive Akatsuki. His ruthlessness even extends to the point where he is willing to sacrifice his own son in order for himself to survive, showing that he cares little for his son. This selfish attitude is again demonstrated when he demands Sakura to perform transplant surgery on him even though such a surgery would kill his son. He also has the belief that peace halts the progression and evolution of humans and therefore as a species they would inevitably and eventually be destroyed.

Appearance
Shin is a tall and bald man with a horizontal scar runs from his right temple to the bridge of his nose. Notably, he has at least ten Sharingan implants, five visible on his left arm and three addition ones on his head. At the same time, the Sharingan in his right eye socket is held open by eight stitches; to which the sclera appears dark and blood shot. He first appears garbed in a dark, hooded cloak, later discarding it to reveal a dark, long-sleeved, high-collared cloak bearing an Akatsuki cloud emblem on both its front and back, as well as dark pants and boots.

Abilities
Shin's abilities are still largely unknown. However, given that he possesses multiple Sharingan, it can be reasoned that he is skilled in using the dōjutsu and its enhancements.

Sharingan
Shin possesses multiple fully-matured Sharingan implanted into his head and left arm. Thus, it can be inferred that he is highly advanced with these eyes and/or has tremendous reserves of chakra, having them constantly activated while showing no signs of tiring. With them, he has heightened perception, able to perform various complicated attack patterns. He also owns a mysterious creature with a Sharingan and is able to share vision with it and others.

Mangekyō Sharingan
Through unknown means, Shin was able to awaken the Mangekyō Sharingan. Its pattern is a large circle around the pupil with three points spaced out, which is identical to his son and spying creature. The same Mangekyō pattern is also reflected on several Sharingan on top of his head. With his main right eye, he was shown to be able to telekinetically manipulate any tool he marks with a juinjutsu. He is also able to perform a Space–Time Ninjutsu through the same eye and is able to use this ability through his creature as a medium.

Naruto Gaiden: The Seventh Hokage and the Scarlet Spring
With the intent to eliminate the disgrace of the Uchiha clan, he tasks his son Shin to spy on Sasuke. After their brief scuffle, Shin returns to his father. After finding out that Sasuke's daughter, Sarada Uchiha, left Konohagakure, he orders his son to abduct her. His spy creature appears, telling Shin to retreat against the Hokage, to which it used Space–Time Ninjutsu and took Shin along with him.

Later, ready to begin his next attack, the man called forth Shin and six copies of him, before teleporting with Shin. They arrived above Naruto and Sarada and attacked. After Naruto easily repelled the attack, Sasuke appeared to aid Naruto. Quickly, Sasuke faced off against the mysterious Uchiha, swatting away Shin's blades with his sword before attacking with it, only for Shin to easily catch Sasuke's sword. Shin's son then attacks from behind, but Sasuke responds with his Rinnegan, swapping positions with the child before launching a Fire Release: Great Fireball Technique on them. Without hesitation, Shin launches his son in front the fireball to take the brunt of the damage.

Applauding Sasuke's dōjutsu might, Shin announces his desire to make it his own and introduces himself. Having already marked Sasuke's sword, Shin then used his own dōjutsu to stab Naruto with it, catching the latter off-guard, and launched another sneak attack aimed at Sarada, only for Sasuke to shield his daughter with his own body. As Shin began another attack, Sakura Haruno arrived and delivered a devastating blow in retribution for her family being attacked. Badly injured and prime to be take captured, Shin was forced to retreat by having his creature teleport him, his son and Sakura. Upon arriving, he struck down his burnt son. Later, he prepared himself for surgery, ready to have his still alive son's organs transplanted into himself as Sakura watched.

Trivia

 * means "new" in Japanese, possibly referring to how he is a new Uchiha.

Quotes

 * "Peace means an end to evolution for humans, that's exactly what you all are."
 * "Species without evolution are eventually destroyed."