Indra Otsutsuki‎ (大筒木インドラ, ‎Ōtsutsuki Indora) was the first born son of Hagoromo Otsutsuki. He was initially thought to be the most suitable successor of his father’s teachings, however, it was his younger brother Asura that ended up inheriting this mantle — a decision that would lead the two brothers to fight against each other. Indra is also credited with being the creator of ninjutsu, and the progenitor of the Uchiha clan.

  In the anime, despite the loss of his mother following problems with his younger brother Asura‘s birth, Indra’s childhood was still peaceful and joyous, spending his time either blissfully alongside his father and brother Asura, or regularly reading his father’s books and journals. Under their father’s tutelage, the two brothers studied Ninshū in the hopes of one of them becoming the great sage’s successor. As Indra continued to amaze all with his natural capacities and advanced growth rate, he began showing his ingenious side, realising how chakra could be altered to perform more versatile feats. Soon afterwards, the other Ninshū followers learned from Indra’s example and began using this new innovation to improve the quality of life for both themselves and the village. While initially proud of his discovery, Indra grew concerned when he noticed that everyone began focusing more on physical growth rather than spiritual as what was meant for Ninshū. Periodically, Black Zetsu would secretly approach Indra alone, goading him with praises and curiosity towards Indra’s true potential, even going so far as to say he could rival if not surpass the Sage of Six Paths himself.