Indra Ōtsutsuki

He was the elder son of the Sage of the Six Paths.

Background
He inherited the Sage's eyes, his powerful chakra and spiritual energy. He believed that force and strength were the key to peace. When the Sage was on his deathbed, he selected the younger brother to carry on his dream of establishing peace throughout the world. The older brother, angry and jealous that his father had not chosen him, fought his younger sibling 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
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 the 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. The pattern of his dōjutsu also appears similar to the symbol of the Uzumaki Clan.

Abilities
While virtually nothing is known of his abilities, he inherited his father's powerful chakra and spiritual energy, and also fought using a sword which he was presumably skilled at wielding. He also inherited a form of his father's dōjutsu, though the abilities of which — if any at all — are currently unknown.

Trivia

 * 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 of his brother, due to his father's decision, may have transcended down throughout his lineage and become 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.