Shinnosuke Nohara, commonly called Shin-chan, is a five-year-old boy whose daily life and adventures form the core of the series. He exhibits a unique blend of childlike innocence and precocious behavior, often using adult language while misunderstanding its full meaning. His personality combines brutal honesty, extreme curiosity, and a near-total lack of shame, leading to socially inappropriate antics like pulling down his pants to perform the "buri buri" dance while singing original songs such as "Buttock Alien." Despite his mischievous nature, he displays unexpected talents in surfing, kendo, fishing, skiing, swimming, baseball, soccer, and photography. These abilities contrast with his typical laziness, love for eating and sleeping, stubbornness, and stinginess—traits inherited primarily from his mother. Like his father, he shows a marked interest in pretty young women, often attempting to flirt with phrases like "Do you like green peppers?" He maintains a clear preference for college student Nanako Oohara and shows no interest in girls his own age. His linguistic quirks include frequent word substitutions (e.g., "promise" becomes "promotion") and mixed-up greetings, alongside nonstandard pronouns like "ora" for himself and "hoi" for "yes." His written language contains misspellings, and he often misrepresents sophisticated phrases overheard from adults. He intensely devotes himself to the superhero Action Mask, rushing to watch the show daily at 5 PM, and has created an imaginary alter ego named Buriburizaemon. Within his family, he shares a teasing yet deeply affectionate bond with his mother Misae, inheriting her eyes and stubbornness. He mirrors his father Hiroshi's flirtatious tendencies and eyebrow features, often inadvertently causing Hiroshi's punishments by revealing his secrets to Misae. As an older brother, he demonstrates consistent protectiveness and care toward his sister Himawari, bonding with her over shared mischief. The family dog, Shiro, was rescued by him but remains subject to neglect due to his forgetfulness. Socially, he belongs to the close-knit Kasukabe Defence Force (KB) alongside friends Toru Kazama (his closest companion, addressed by surname), Masao, Nene, and Bo. His interactions range from bickering—particularly with Kazama—to displays of loyalty, such as staying with Kazama during emotional lows. On rare occasions, he exhibits surprising maturity and selflessness, like saving a frog in the rain despite risking punishment or arranging playtime for a lonely friend's father. These instances are typically undercut by subsequent antics, though films emphasize his capacity for empathy more than the regular series. In the film *Explosion! The Hot Spring's Feel Good Final Battle*, his role expands beyond typical behavior. He befriends Tamba, a spirit linked to the "golden soul hot spring," after discovering him collapsed and assisting him. This encounter leads to Tamba embedding the hot spring's power source beneath the Nohara home. When the villain Dr. Akamamire threatens to destroy this power source, Shinnosuke's family transforms into superheroes using the hot spring's energy to combat Akamamire's giant robot. Throughout this conflict, Shinnosuke displays resourcefulness and teamwork, directly contributing to the villain's eventual reform after exposure to the hot spring's healing properties. His immediate rapport with G-Men agent Kusatsu—due to their similar demeanors—further aids the mission. His background traces to Yoshito Usui's earlier character Shinnosuke Nikaido from *Darakuya Store Monogatari*. Official media consistently portrays him as a fictional creation whose antics occasionally resolve surrounding problems, whether accidentally or through latent insight, without incorporating the apocryphal account of a real child's death.