Himawari Nohara is the infant daughter of Hiroshi and Misae Nohara and younger sister to Shinnosuke "Shin" Nohara. Born on September 27, 1996, she resides permanently in Kasukabe city. Her name, meaning "sunflower," originated from a viewer submission contest with approximately 107,135 entries and 2,807 unique suggestions, ultimately chosen by Shin-chan within the series. Sunflower motifs consistently adorn her clothing and toys. Portrayed as precocious and vibrant, Himawari communicates thoughts through subtitles despite lacking verbal speech. Her character matures intellectually while retaining infant status, exhibiting a mischievous and energetic personality. She crawls at remarkable speeds that exhaust even Shin-chan and shares his signature sideways smile. Himawari displays a strong attraction to handsome young men and shiny objects like jewels or brand-name goods, demonstrating an ability to discern genuine jewelry from fakes. This trait reflects her mother’s stubbornness. Her fascination leads her to frequently steal and conceal Misae’s jewelry. She often mimics Shin-chan’s troublesome antics, provoking parental dismay. Though deeply caring toward her family—especially her brother—she habitually blames him for her own mischief, sparking familial friction. Special manga chapters depict Himawari at age five as equally playful and chaotic as Shin-chan, overwhelming her ten-year-old brother. Her future appears in "Super-Dimension! The Storm Called My Bride," showing her as a 20-year-old police officer who retains her childhood habit of blushing when complimented. Her mother notes occasional neglect of family visits. In this role, she aids in arresting criminals like Masuzo Kaneari. Relationships define her dynamics: Masao Sato views her as a sister and dreams of her calling him "Masao onii-chan," while Toru Kazama sees her as a little sister and imagines marrying her grown-up self. Within her family, she oscillates between adoration and annoyance due to her innocent yet disruptive behavior. She shares Shin-chan’s aversion to onions, often provoking scoldings when refusing them. A notable future storyline introduces Shinko-chan, a girl strongly implied to be Himawari at age five. Shinko-chan advises Shin-chan to improve his behavior and care for his younger sister, reinforcing her enduring presence across the series' timeline.