Born in an obscure village on Sunrise Island, Kamui could communicate with the god when she was little.
As she got older, she has acquired psychic power strong enough to control everything around her with her mind.

But her power took a heavy toll on her body.
Consequently, she lost control of it and wreaked havoc on her village, all the villagers dying in pain with their minds distorted.

Having lost her home, the girl suffered a mental breakdown that caused her to forget her past and gave her schizophrenia. And now she has two personalities living inside her—Tama and Kamui.
Tama stays an innocent, harmless girl, while Kamui has inherited the ominous psychic power.
Kamui can use her mind to manipulate people and even warp their psyches. But this dreaded power comes at the cost of a weary body and a nearly broken spirit.

The loss of memory did little to relieve her pain. Her vision was declining and her mind was growing fuzzy.
She knew full well that one day she would lose control of her emotions and bring yet another disaster to this land.
Instead of letting that happen, she thought she might as well make herself disappear, quietly. So she took her favorite books and left her village.
No one has seen her ever since, and the only evidence of her existence is the painful memories she has left people with.