Nagi is a young boy, approximately eleven years old, who appears as a main character in the Dawn chapter of the anime Phoenix. He is the younger brother of a girl named Hinaku. After his entire tribe is annihilated, Nagi is captured and made into a slave, an experience that marks the beginning of his difficult journey. His primary motivation is to find the legendary Phoenix and obtain its blood, which he believes has the power to heal his sister and restore his lost tribe. This goal drives him to undertake a dangerous quest, first to locate the Phoenix and then to climb the treacherous Fire Mountain where the creature is said to dwell.

Despite his youth, Nagi displays considerable determination and resilience in the face of hardship. He is deeply devoted to his sister and willing to endure peril and servitude for her sake. Early in his journey, he attracts the attention of the warrior Saruta Hiko, who sees a reflection of his own harsh past in the orphaned boy. Saruta Hiko takes Nagi under his care and eventually adopts him, providing guidance and training that help shape Nagi’s resourcefulness. Through this relationship, Nagi learns to survive and begins to understand the wider world, including the complexities of power, loyalty, and sacrifice.

Nagi’s role in the Dawn story is that of a questing protagonist whose actions set the central narrative in motion. His interactions with Saruta Hiko and his sister Hinaku form the emotional core of his arc, and his search for the Phoenix places him at the heart of the series’ exploration of life, death, and the consequences of seeking immortality. Over the course of the story, Nagi evolves from a helpless survivor into a more capable and determined individual, though he remains shaped by the loss of his family and his relentless hope for a cure. He possesses no supernatural abilities; his strength lies in his perseverance, his bond with Saruta Hiko, and his unwavering loyalty to his sister.