Hamura Ōtsutsuki

He was the son of princess Kaguya Ōtsutsuki‎‎ and the brother of Hagoromo Ōtsutsuki. Alongside his brother, he was one of the first humans to be born with chakra.

Background
Kaguya Ōtsutsuki gave birth to two sons, the first humans to be born with chakra. To repent for their mother's sins, Hagoromo and his brother fought and defeated the Ten-Tails, with Hagoromo becoming its jinchūriki. It is unknown what happened to Hagoromo's brother after this. For unknown reasons, he doesn't seem to appear in the history or mythology of the shinobi world like his brother.

Appearance
He was a long-haired man who wore a light, full-length haori with a high collar and dark pants. He had his sword in its sheath strapped to his left hip.

Abilities
Together with Hagoromo, he was able to defeat the Ten-Tails. In battle he carried a staff and a sword which he was presumably skilled at wielding.