Thousands of years ago, Kaguya arrived from another world with her clan in search of the Sacred Tree fruit.<>In the anime she arrived alone and, on the day of her arrival, she was found by the people of a small country called Sou no Kuni (The Ancestral Country). ), which led him to their leader, Emperor Tenji. <>Clarifying herself as the Guardian of the Sacred Tree, Kaguya uses a mysterious power to erase Tenji's memories of the encounter and then settles down with her people, and becomes recognized as a concubine by Tenji.<> Getting closer to the leader, she ends up getting pregnant.<> When Ka no Kuni (That Country) starts threatening the Sou no Kuni over a border dispute, Tenji tries to prevent a war from breaking out by declaring that anyone who attacks Ka no Kuni will be executed, this order Kaguya violates when she is threatened by the That Country's soldiers, so she and her aides Aino became hunted by their own country for execution.<>
Losing all faith in humans but still longing for peace, Kaguya believed that it was necessary for her to have god-like powers to end all human conflicts.<> For that, she ate the fruit of the Sacred Tree. Using her newfound powers, Kaguya single-handedly ends the war.<> In the anime, she does this by releasing the Infinite Tsukuyomi, and to ensure humanity doesn't become extinct, Kaguya releases several humans from genjutsu and erases their memories.<>
For her services in stopping the conflict, she was worshiped as the Rabbit Goddess (卯の女神, Usagi no Megami).<> She later gave birth to twins, Hagoromo and Hamura. As time passed, however, Kaguya began to lose faith in humans as her powers blinded her. It changes the public image of her from a benevolent goddess to a Devil (鬼, Oni).<> This eventually causes her to go insane by performing acts such as turning the Infinite Tsukuyomi victims into the White Zetsu Army, namely the Sacred Tree Ritual, in preparation against the descendants of Tsutsui from another world who came to earth to steal his chakra for themselves.<>
Information regarding this threat is written in a highly encrypted scroll, stored within his castle in the ice dimension.<> Out of envy that his son inherited his chakra, An enraged Kaguya combined with the Sacred Tree itself against them in the form of the Ten-Tails in an attempt to reclaim the chakra she had given them.<>
