Movie
Description
Sewashi Nobi, the great-great-grandson of Nobita Nobi and Shizuka Minamoto, belongs to the Nobi family in the 22nd century. His parents resemble Nobita’s mother visually but display a more futuristic and slightly gentler demeanor. During infancy, Sewashi accidentally selected Doraemon at a robot caretaker audition by pressing a button. Though initially reluctant, his parents accepted the substandard robot due to Sewashi’s instant attachment and the impracticality of returning him, forging a lifelong bond.

In early childhood, Sewashi crafted a clay Doraemon figure as a gift. Dissatisfied with the ears, he ordered a robotic rat to model them after Doraemon’s real ears. The robot misinterpreted the command, gnawing off Doraemon’s ears during sleep. This incident caused Doraemon’s musophobia and deepened Sewashi’s sense of responsibility toward him.

Sewashi exhibits greater confidence and technological aptitude than Nobita but shares his ancestor’s academic struggles and fear of dentists. His energetic, mechanically inclined nature reflects his futuristic upbringing. His bond with Doraemon evolved from caretaker dependency to profound mutual loyalty, motivating Sewashi to send Doraemon to the 20th century. This mission aimed to alter the Nobi family’s future financial hardship by improving Nobita’s destiny.

In "2112: The Birth of Doraemon," Sewashi’s actions pivotally shape events: his accidental auction selection and the ear incident define Doraemon’s identity. Later, when temporal criminals hold Sewashi hostage, Doraemon accidentally rescues him, reinforcing their fates. Sewashi’s deployment of Doraemon to the past establishes the series’ core premise, cementing him as a catalyst for generational change. His appearances consistently bridge Doraemon’s origins with his mission to transform Nobita’s life.

Sewashi’s visual design varies across adaptations: early versions feature glasses and red jumpsuits, while later iterations show teal shirts, white pants, or futuristic jumpsuits. His hair shifted from black to ginger in "Stand by Me Doraemon," aligning with manga art. These changes reflect artistic revisions, not narrative alterations.