TV-Series
Description
Nurugai is a young girl, about twelve years old, and the last surviving member of the Sanka, a mountain people who lived apart from the authority of the shogunate and were therefore treated as rebels. She has a small, boyish build, unkempt dark hair, and a simple appearance, wearing rough fur clothing and ornaments from her village. Because of her appearance and her habit of using a masculine first-person pronoun, she is frequently mistaken for a boy, and it is only when her assigned executioner Tenza points out her physique that she openly states she is a girl.

She was born and raised in a hidden mountain village, where her grandfather, who acted as her guardian, taught her the knowledge and skills of the Sanka people, including hunting, tracking, and living off the wilderness. She had no understanding of the larger political world. One day she helped a man she believed to be a lost samurai and guided him to her village. He turned out to be a shogunate agent, and his arrival led to the massacre of the Sanka settlement. Her grandfather was killed before her eyes, and she was taken alive, partly to be interrogated about the locations of other mountain villages. She was then imprisoned and sentenced to death, not because she had committed any crime, but simply because of who she was. She carried heavy guilt over what happened, blaming herself for the destruction of her home, and she spent her time in captivity apologizing to her dead grandfather. This left her in a state of despair and self-destructive indifference, with little desire to keep living.

Her motivation changes through the intervention of Tenza, the Yamada Asaemon executioner assigned to monitor her. He tells her that she does not look like a criminal and encourages her to survive, telling her she should find a way to live. These words rekindle her will to live, and she admits that she wants to go back to the mountains rather than die. She becomes one of the death-row convicts sent to the island of Kotaku on the expedition to find the Elixir of Life in exchange for a pardon, and she is paired with Tenza for the mission.

On the island, her role is shaped by her background. Although she is not a frontline fighter at first, her Sanka knowledge makes her invaluable, as she is able to read the terrain, detect danger, and guide others through the unfamiliar and hostile environment. She acts as a bridge between the outsiders and the wild nature of the island, using her survival instincts and understanding of the natural world to keep the group moving safely. Her combat ability is limited early on, but she gradually develops the use of water-type Tao, the elemental energy of her nature, and grows into someone capable of standing and fighting alongside the more experienced warriors.

Her key relationships are with Tenza and the blind swordsman Shion. Tenza is the person who saves her emotionally by giving her a reason to live, and his later death during a battle against a Tensen becomes a defining loss for her. It hardens her resolve and gives her the determination not to lose anyone else. Shion, who initially acts as her protector, becomes her long-term companion. Their relationship develops from one of a guarded child and a guardian into a partnership of people who fight and survive together. After the island, the two travel together for years, becoming known for wandering from place to place and settling problems wherever they go, and she is shown in the end having grown into an adult woman while still carrying the will to live that Tenza gave her.

Her development is the core of her character. She begins as a despairing child who feels she is not meant to survive and believes she caused the death of her family, and she becomes someone who chooses to live, fights to protect others, and eventually finds a new place in the world. Her notable abilities are the practical skills of the Sanka, including hunting, tracking, trapping, and survival in the wild, along with her agility, her sharp awareness of danger, and her growing command of water Tao, which she learns to use in combat against the supernatural threats of the island.