Hidetoshi Dekisugi, a classmate of Nobita Nobi, excels academically and athletically, regularly earning perfect exam scores and dominating sports like baseball, soccer, and track. His intellect spans astronomy, philosophy, and creative disciplines such as realistic painting and portraiture. Practical talents—cooking, crafting, and performing magic tricks—solidify his reputation as a polymath. Despite his achievements, his humility and courteous nature garner admiration from peers and educators, cementing his status as an exemplary student. Dekisugi shares a bond of mutual respect with Shizuka Minamoto, rooted in intellectual pursuits. They collaborate on studies, literature, and plein-air painting, maintaining a platonic rapport. In *Stand By Me Doraemon*, he confesses romantic feelings to Shizuka, who gently rejects him, citing his self-reliance as a barrier to her envisioned supportive partnership. This moment illuminates the nuanced emotional undercurrents of their relationship. Nobita views Dekisugi with envy, resenting his academic prowess and proximity to Shizuka, often scheming with Doraemon’s gadgets to disrupt their interactions. Yet Dekisugi responds with empathy, shielding Nobita from Gian and Suneo’s bullying and covertly aiding him—such as assisting Shizuka in baking Nobita’s birthday cake. These acts reveal his capacity to recognize Nobita’s latent potential beyond scholastic metrics. As an adult, Dekisugi pursues astronautics, marrying and fathering a son named Hideyo. This career aligns with his scientific curiosity, though narratives offer scant details about his later life. His success contrasts Nobita’s early hardships, reinforcing his role as a symbol of stability. His name carries dual symbolism: “Hidetoshi” (“unusual talent”) and “Dekisugi” (a pun on *dekisugiru*, meaning “over-achieving”) underscore his narrative function as Nobita’s antithesis. A rationalist, he approaches challenges with logic, eschewing reliance on Doraemon’s gadgets or superstitions. Consistently portrayed as principled and intellectually gifted across media, Dekisugi’s alternate-universe counterparts—such as a bullied, less intelligent version—highlight his primary role as Nobita’s foil. These variations accentuate the series’ themes of self-worth and untapped potential.