Nae Kogure

Meeting Yuta before WWII, this character shared a secret about mermaid ashes, which she used to create the everlasting "red valley" of blooming flowers. A romantic relationship blossomed there, leading to jealousy from her fiancé, Eijiro, who tragically murdered her upon discovering the truth. Years later, Eijiro regretted his actions, but the ashes brought her back as a shadow. Despite this, a reunion with Yuta was attempted, and the character experienced periods of murderous trance, all while Eijiro remained deeply in love.