Naruto Uzumaki is a shinobi of Konohagakure's Uzumaki clan and the jinchuriki of the Nine-Tails, a fearsome beast that attacked the village on the day of his birth. Orphaned at birth, his parents Minato Namikaze and Kushina Uzumaki sacrificed themselves to seal the creature within him, a fate that caused him to be shunned and ostracized by most of the village throughout his childhood. Despite this painful and lonely upbringing, Naruto grew into a loud, energetic, and relentlessly optimistic young man who craves attention and recognition. His personality is defined by a stubborn refusal to give up, a playful and sometimes mischievous nature, and a deep-seated desire to be accepted by those around him. His core motivation is to earn the respect of his village and fulfill his dream of becoming the Hokage, the leader of Konoha, a goal that drives every aspect of his life. He also holds a personal ninja way, code of conduct, that is centered on never going back on his word.

In the context of the film Naruto Shippūden: The Will of Fire, which takes place after the defeat of the Akatsuki members Hidan and Kakuzu but before Jiraiya's mission to the Rain Village, the five great shinobi nations are on the brink of war after shinobi possessing bloodline limits go missing. When his mentor and teacher, Kakashi Hatake, mysteriously disappears from the village, the Fifth Hokage, Tsunade, places the village under martial law and forbids pursuit. Unable to accept this order, Naruto chooses to defy the village leadership, believing that he must honor the lesson Kakashi taught him about protecting those important to him. With the help of his teammate Sakura Haruno, he escapes confinement and pursues Kakashi alone, determined to bring him back and prevent a catastrophic war. This decision puts him at odds with his own village and causes his friends from the other squads to be sent after him to bring him back.

Naruto's key relationships are central to his character. His bond with Kakashi, his first real mentor on Team 7, shapes much of his growth as a ninja and as a person. His friendship and rivalry with Sasuke Uchiha, who has left the village by this point, remains a powerful emotional anchor that appears in the film through flashbacks and his internal drive. His relationship with Sakura is one of deep trust and mutual reliance, as seen when she helps him escape. His friendship with Shikamaru Nara is also significant, as Shikamaru leads the group sent to retrieve him, forcing a conflict between their loyalty to orders and their bond with Naruto. His connection to his former mentor Jiraiya, though Jiraiya does not appear in this film, continues to influence his growth and the techniques he uses.

Over the course of his journey, Naruto develops from a lonely, attention-seeking outcast into a determined, compassionate, and powerful ninja who fights not only for his own dreams but also for the well-being of his comrades and his village. In this film, he demonstrates the maturity to stand by his principles even when they clash with authority, showing a willingness to risk his standing in the village he loves in order to save the person who taught him what that love means. His growth is evident in his tactical thinking, his emotional resilience, and his ability to inspire loyalty in his friends, even as they are ordered to stop him.

Naruto possesses a vast and unique set of abilities. His most iconic technique is the Shadow Clone Jutsu, which he uses with extraordinary skill and creativity to overwhelm opponents through sheer numbers and distraction. He is a master of the Rasengan, a powerful ball of spinning chakra, and has created his own variation, the Rasenshuriken, a wind-natured technique that damages an opponent's cells on a microscopic level. By the time of this film, Naruto has also mastered Sage Mode, a powerful state that enhances his physical abilities, sensory perception, and the strength of his techniques by gathering natural energy from the environment. His status as the jinchuriki of the Nine-Tails allows him to draw on the massive chakra reserves of the tailed beast within him, though his control over this power is still a work in progress during this period. He is also a sensor-type ninja, capable of sensing chakra and intent, and his stamina and endurance are among the highest of any shinobi in the series. These abilities, combined with his unbreakable will and his capacity to grow stronger through each battle, make him a formidable force even when facing enemies far beyond his apparent level.