Movie
Description
Nagate Tanikaze is the main protagonist and central figure of the story. He is a clone of the legendary ace pilot Hiroki Saitou, although he was raised in secret as Saitou's grandson in the deepest, most isolated levels of the starship Sidonia. From childhood, he trained relentlessly on an old Garde simulator, never interacting with anyone but his grandfather. After Hiroki Saitou's death, Nagate is forced to emerge from the underground and is quickly conscripted into Sidonia's Defense Force, where he takes command of the legendary Garde unit Tsugumori.

His background leaves him profoundly shy, naive, and lacking in common knowledge of Sidonia's culture and social norms. He is often quiet and awkward around others, especially because he is a pure human who has not undergone the genetic modification for photosynthesis that most Sidonians have, meaning he must eat multiple meals each day rather than relying on light. Despite his introverted demeanor, Nagate possesses a strong sense of duty and a deep, unwavering desire to protect Sidonia and its people, a motivation inherited from the heroic legacy of his grandfather. He is not driven by ambition or glory but by a simple, earnest wish to live up to the responsibility placed upon him.

As the series progresses, Nagate grows from an isolated outcast into Sidonia's most formidable pilot and a symbol of hope for humanity. His key relationships shape this journey: he develops a deep connection with Shizuka Hoshijiro, a fellow pilot who becomes his closest companion and love interest; he forms a loyal friendship with the part-Gauna hybrid Tsumugi Shiraui; and he faces bitter rivalry and resentment from Norio Kunato, the former top ace who sees Nagate as a threat. The revelation of his engineered origins as a clone forces Nagate to confront questions of identity and purpose, but he ultimately accepts his role as the successor to his grandfather's will.

Nagate's notable abilities are centered on his exceptional skill as a Garde pilot. His intense, solitary training under Hiroki Saitou gave him superb reflexes, spatial awareness, and combat instincts that allow him to pilot the older, more demanding Tsugumori with extraordinary precision. He is known for his calm under pressure and his ability to execute innovative tactics in battle against the Gauna, often turning the tide of engagements that seemed hopeless. Later, he pilots custom-built Gardes designed specifically for his abilities, and his combat record makes him the ace of the Sidonia Defense Force, repeatedly leading the charge to destroy Gauna cores and protect the ship from annihilation.