Himawari Nohara is the infant daughter of Hiroshi and Misae Nohara and younger sister to Shinnosuke Nohara. As the family's youngest member, she remains a baby during the main series timeline, communicating through subtitles, not words. Her name, meaning "sunflower," was chosen by Shinnosuke via a viewer contest in episode 204-2, receiving roughly 107,135 entries. Sunflower designs often adorn her clothes and toys. She bursts with a vibrant, precocious personality, displaying mischievous energy through speedy crawling and disrupting household items. Like her brother, she dislikes onions and refuses to eat them, inviting maternal reprimands. Himawari exhibits a pronounced attraction to handsome young men, echoing her mother, and a strong fascination with sparkling jewels and brand-name goods. She can discern real gems from fakes, discarding the imitations. This desire for valuables sometimes leads her to hide her mother's jewelry. She frequently mimics Shinnosuke's antics, adding to household chaos, and treats the family dog Shiro as a plaything, though Shiro remains protective. Despite sibling rivalry, she admires Shinnosuke and shares a close bond with him. Special manga chapters depict her as a playful, chaotic 5-year-old, creating situations even a 10-year-old Shinnosuke finds overwhelming. Her adult future in "Super-Dimension! The Storm Called My Bride" shows her as a police officer or secret agent. Here, she helps arrest criminals like Masuzo Kaneari but visits family infrequently, still blushing at compliments and attracted to handsome men. Beyond her family, Masao Sato sees her as a sister, dreaming she'll call him "Masao onii-chan." Toru Kazama aspires to marry her when grown, while Himawari regards him as a brother; some narratives depict their adult marriage. In "Fierceness That Invites Storm! Me and the Space Princess," Himawari is central as a prophesied figure. Aliens from planet Himawari identify her as the princess destined to restore production of "happiness bubbles" preventing Earthly depression. After Shinnosuke rashly agrees to let them take her, she is crowned princess but separated from her family. The Noharas' journey to retrieve her culminates in a reunion where she mentally calls Shinnosuke "brother" for the first time. "Otakebe! Kasukabe Yasei Ōkoku" (Movie 17) features Himawari as part of the Nohara family caught in an eco-terrorist plot transforming humans into animals; her parents become a chicken and panther. The film documents no distinctive details about Himawari's specific role, interactions, transformations, or character development beyond her family inclusion.