Nobita Nobi is the curious and kind-hearted young protagonist of Eiga Doraemon: Nobita no Esekai Monogatari. He is an elementary school student living in Tokyo, often portrayed as lazy and academically underachieving, but he possesses a strong sense of empathy and a desire to do good. In this story, Nobita and his friends use Doraemon's gadget, the Entering Light, to step into paintings for a school assignment. When Nobita becomes frustrated and gives up, he accidentally causes a mysterious painting to fall into his room, sparking an adventure that leads him into a medieval European world called Arturia.

Motivated by curiosity and a wish to help the girl from the painting, Claire, Nobita joins Doraemon and their friends in exploring this painted realm. He shows genuine interest in art when he asks Milo to teach him to draw, and he follows Milo's advice to draw what he loves, creating a simple yet heartfelt crayon picture of Doraemon. Throughout the journey, Nobita demonstrates loyalty and courage, facing challenges alongside his companions despite his usual timidity. His role in the story is that of a catalyst: his accidental involvement with the painting sets the plot in motion, and his good-hearted nature helps build trust with the new characters Claire, Milo, and the bat-like creature Chai.

Key relationships include his close bond with Doraemon, who provides guidance and gadgets, as well as his friendship with Shizuka, Gian, and Suneo, who accompany him on the adventure. Nobita also forms a meaningful connection with Milo, learning from the young artist's passion. His development in this film is subtle but notable: he steps outside his comfort zone by engaging with art and by persisting in a mission that requires patience and bravery, rather than relying solely on Doraemon's tools. While he does not display any special physical abilities, his willingness to act on his kindness and his occasional resourcefulness when using gadgets are his defining traits.