Kanoe is a secondary character from the anime and manga series X. She is the younger sister of the princess Hinoto, a powerful dreamseer who resides in a sealed tower in Tokyo. Unlike her sister, Kanoe is not a dreamseer in most versions of the story, but she possesses the related ability to enter and observe the dreams of others, including those of her sister. In the physical world, Kanoe works as a secretary in the Tokyo Metropolitan Government Building, a position that allows her to operate from within the heart of the city's establishment.

Kanoe serves as the leader and primary supporter of the Dragons of Earth, the group of seven fighters who seek to destroy humanity and allow the world to begin anew. Her alliance with this destructive force makes her a central antagonist. However, her motivations for opposing her sister are complex and vary between the different adaptations of the story. In the television anime series, Kanoe is portrayed as being driven by a deep resentment towards Hinoto. She is bitter that her sister was always favored and treated as special for her powerful prophetic gifts, while Kanoe herself was overlooked. In this version, she works to make Hinoto's tragic prophecies come true specifically to cause her sister pain and suffering.

In the original manga and the theatrical film adaptation, Kanoe's character is given a more sympathetic and nuanced portrayal. Her actions are motivated not by hatred, but by a profound love for her older sister. Kanoe sees Hinoto as a prisoner within the Diet Building, forced to sacrifice her freedom and her life to shoulder the burden of humanity's future. By gathering the Dragons of Earth and ensuring that Hinoto's prophecies of destruction fail to come to pass, Kanoe hopes to prove her sister wrong, thereby freeing her from the curse of being an infallible dreamseer. Her ultimate goal is to liberate Hinoto from a life of endless suffering and isolation. This deep bond is a defining trait, as despite their opposing sides, the sisters are shown to care for one another.

Kanoe has a close and intimate relationship with Yuto Kigai, one of the Dragons of Earth, and she is also shown to have flirtatious interactions with other characters such as Satsuki and briefly with Kamui's friend, Fuuma Monou. Her character arc ends in tragedy across all versions of X. In the manga and television series, near the end of the world, Kanoe goes to the Diet Building to confront her sister. However, she is killed by the dark side of Hinoto's own dream-self, a manifestation of the princess's inner suffering. In the film adaptation, her fate is different; she is killed by the young swordsman Fuuma Monou just before the final battle, and she ultimately dies in her sister Hinoto's arms, finally confessing her true loving intentions.