Nobita Nobi is an elementary school student plagued by poor academics and physical clumsiness. He regularly scores zero on tests and endures bullying from classmates Gian and Suneo. His laziness, procrastination, and avoidance of studying fuel his failures, drawing frequent scoldings from teachers and his mother.
His early reliance on Doraemon's gadgets defines him. He often employs these tools for revenge, to impress his crush Shizuka Minamoto, or to solve minor problems. This dependence leads to misuse, such as deploying the "Imprinting Egg" to manipulate relationships or the "Anywhere Door" to invade Shizuka's privacy, occasionally triggering unintended results.
Despite these flaws, Nobita shows unexpected kindness and courage. He risks his life in a blizzard to save Shizuka, disguising himself as his future self to protect her. Such acts, along with accepting blame to shield others, reveal his capacity for selflessness. His creativity surfaces in inventive gadget applications, like using "power of wind" fans for flight or adapting the "voice hardener" for transportation.
Nobita's bond with Shizuka proves central. His attempts to push her toward Dekisugi—convinced she deserves better—fail when she perceives his inherent kindness, especially after he flips her skirt while deliberately closing his eyes to preserve her privacy. Her resulting concern for him marks a pivotal moment in their relationship.
The film charts his evolution from dependency to self-reliance. Facing Doraemon's return to the future, Nobita demonstrates resilience by enduring a brutal fight against Gian without gadgets, refusing to yield despite a severe beating. This signifies his resolve to change.
Nobita's background involves a doomed future where he marries Gian's sister Jaiko, faces bankruptcy, and burdens descendants with debt. His great-great-grandson Sewashi intervenes, sending Doraemon to alter this timeline, ultimately leading Nobita to marry Shizuka and secure a brighter future.
In the conclusion, Nobita uses a solution manifesting the opposite of his statements. After lamenting Doraemon's permanent departure, the effect reverses, enabling Doraemon's return. Their reunion underscores their inseparable connection.