Kokoro Island is rumored to be the oldest place in the world, home to X-You Mountain, which existed even before the first human. However, Kushi and Kurenai Villages have only existed for slightly over 2,000 years.
Kushi and Kurenai were the sons and daughters of the first Senin, respectively, who were left on Kokoro Island by their mother before her death.
The two children split apart, with Kushi, the son, taking two-fifths of the island from the west, and Kurenai, the daughter, taking another two-fifths, leaving the rest to the beast of the World.
Kurenai had many sons and daughters, but one daughter stood out - Katsuragi Ikumi, who was strangely born with red hair and amber eyes.
Ikumi was one of those rare children who awakened a Primordial space without the help of the Faith Tama. However, Ikumi had a problem - she wanted to take over her mother's position and become the "Mother of All Things" on the island.