Mataiden Uchiha

Mataiden Uchiha (団扇マタイ伝, Uchiha Mataiden) is a member of the Uchiha clan who died as a sacrifice to end the Third Great Shinobi War in the Naruto Raijū series. He serves as a driving plot force for his older brother, Riyan Uchiha, due to the brothers having been so close as children.

Background
Mataiden, unlike his elder brother, was born in Konohagakure. He was born during the waining days of the Third Great Shinobi War. Kumogakure requests for Konoha to sacrifice and Uchiha and the Third War will end. Danzō picks Mataiden because he fears Mataiden's Sharingan powers and kills him in cold blood, for all Konoha to see, causing Riyan to go on a rampage and awaken his Mangekyō Sharingan.

Appearance
When he was alive, his casual clothes would consist of a black shirt with a large Uchiha clan symbol on the back of it, and black pants with a weapons pouch strapped to them. When on duty, he would wear the traditional shinobi flack jacket, although he was never shown wearing it in an actual mission.

He, like most members of his clan, possessed dark grey eyes, and also had black hair that hung near his cheeks to frame his face. Being brothers, Riyan and Mataiden had a similar appearance, but with subtle differences. Riyan's hair color appeared slightly duller and with a softer flow to it, without the spiky style at the back. His skin was also slightly darker.

Personality
Since coming into the Ninja Academy and becoming Genin, Mataiden seems to have had conflicting emotions. While part of him wanted to be accepted by his sensei and his new teammates, another part of him seemed unable to let go of the bond he had made with his older brother, Riyan, to the point of protecting him even from any emotional stress he went through. The emotions seemed to have become more confusing for him in his first mission on the battlefield.

After realizing how protective of him his older brother is, and how much he cares about him, Mataiden feels even more compelled to protect him, out of admiration and duty, as well as brotherly love - wishing to become a best friend to replace his brother's lack of friends. He even goes so far as to turn his protection to his brother in the afterlife, saying to his brother as he was about to die in his arms that he would always be with him, and to fight no matter what, and he would always protect him. This is a great change from his previous interactions with Riyan, whereas he was somewhat stand-offish and competitive, he becomes quite friendly and loving with Riyan. Subsequently, Mataiden has also begun to have doubts over remaining loyal to his teammates, due to his commitment to his older brother.

Legacy
When he died, he caused his brother's Mangekyō Sharingan to awaken. For years after that, getting revenge on the higher ups from both villages who sentenced his death, was Riyan's driving cause for living. Eventually, Mataiden's former teacher, Hirokashi, takes his eyes from his buried body, only to have Riyan hunt him down and take them back. Mataiden's eyes are then put into Riyan's to create his Eternal Mangekyō Sharingan.