Indra Ōtsutsuki

was the elder son of Hagoromo Ōtsutsuki and the ancestor of the Uchiha clan.

Background
Indra was the first son of of Hagoromo and inherited his father's eyes, powerful chakra and spiritual energy. From a young age, he demonstrated great talent towards ninshū and anything he applied his mind to. Ultimately, he came to believe that he needed no help and chose a solitary life. When Hagoromo was on his deathbed, he selected Indra's younger brother, Ashura, to carry on his dream of establishing peace throughout the world. Angry and jealous that his father had not chosen him, Indra fought against Ashura to claim what he felt was rightfully his. The elder brother's descendants, who would become the Uchiha clan, would continue this fight with the younger brother's descendants, the Senju clan.

Personality
Recognising his own talents, Indra became proud and independent, determined to walk his own path unaided. He believed that force and strength were the ultimate key to peace, and though he loved his father greatly, he challenged his decision to let his younger brother carry on his will.

Appearance
He appears to be wearing a type of robe, and his eyebrows seemed to be clipped short, a sign of nobility in ancient Japan. He had long black hair with two locks wrapped in bandages framing either side of his face and his eyes were turned up at the corners, with markings under them. While similar at first glance to the Rinnegan, the ancestor's eyes did not have the same ripple-like pattern of concentric circles. Instead, his dōjutsu had a spiral-like pattern originating from the pupil. He also had clearly defined sclerae unlike the Rinnegan which has concentric circles covering the entire eye.

Abilities
From a young age, Indra was recognized as a prodigy even in his legendary father's eyes. Having inherited his father's powerful chakra and spiritual energy, Indra possessed a weaker version of his father's Rinnegan, which became the Sharingan and later awakened its enhanced form of the Mangekyo Sharingan. With it, he became the first wielder of Susanoo (and by extension Amaterasu and Tsukuyomi), which he could manifest in its "final" form. As he fought using a sword which he was presumably skilled at wielding.

Trivia

 * "Indra" literally means 'King of Gods' in Sanskrit.
 * The older brother was born with the "eyes" of the Sage of the Six Paths. It is believed that his "eyes" either laid the foundation for or mutated into the other two major dōjutsu in the ninja world: the Byakugan and the Sharingan.
 * His deep hatred towards his brother, due to his father's decision of choosing him as the leader and heir to the ninshū, may have transcended down throughout his lineage and become part of what is known as the "Curse of Hatred".
 * Like his father, he wielded a sword in battle. His choice of weapon could represent his lust for power while his brother's choice of a shakujō could symbolise his desire for love and peace.