Kaguya Ōtsutsuki

Kaguya Otsutsuki is a legendary figure in the Naruto universe. She was the mother of the Sage of Six Paths and the first human able to use ninjutsu.

History
Over a thousand years ago, Kaguya was a princess who lived during a time of constant strife. In order to end the feud, she consumed the forbidden fruit of the God-Tree. By doing so, she gained superhuman powers and was able to stop the wars for the time being. Unfortunately, this also caused the tree to transform into a monster and pursue her in the hopes of reclaiming its power.

It has been said that Kaguya was an extremely domineering woman during her lifetime. Her ability to create jutsu made her a force to be reckoned with and her all-seeing eyes allowed her to watch over humanity. Despite her wishes for a peaceful world, she was not above oppressing free will. It is unknown whether or not she ever contested with the God-Tree or spent her life eluding it. Considering that her sons were the ones to stop the beast, it seems doubtful that she did anything to completely neutralize its threat.

Legacy
Kaguya's methods were discarded by her son Hagoromo and his brother in the hopes that a gentler approach would end the wars permanently. Her aggressive methods were a source of inspiration to her grandson Indora, who would become the progenitor of the war-mongering Uchiha clan.

Madara Uchiha would later discover the history of ninjutsu and make plans to gain the same power Kaguya had so that he could unite all living things under one illusion.