Hiramitsu Hinata is a cheerful second-year student at Sukoyaka Middle School, sharing Class 2-A with Hanadera Nodoka and Sawaizumi Chiyu. Her secret identity is Cure Sparkle, the Pretty Cure of Light, embodying the color yellow. Her speech is peppered with the word "Really" (めっちゃ). In her everyday life, she sports medium-length soft brown hair styled in playful curled pigtails, held by braided sections and accented with distinctive white four-pointed star accessories. A noticeable protruding lower lip characterizes her face. Her typical casual outfit is a yellow top, green skirt, black belt, black-and-white socks, and purple-and-white sneakers, often layered with an oversized sporting jacket omitted in summer. Winter sees her in a striped hoodie, denim shorts, and boots. As Cure Sparkle, her eyes become green with dark teal mascara, her hair shifts to blonde in the same style, gaining triangular bun accents like cat ears. Her transformation outfit features a light yellow chiffon dress over a dark blue and orange bodice, an orange chest bow with a star ornament, a ruffled pale orange jacket with spiked double coat-tails, and yellow strapped shoes over burgundy stockings. Special forms include the "Special Healin' Good Style," where her hair grows longer and curlier, she gains yellow wings, and her outfit incorporates mint-green accents and boots. A "Nyatoran Sparkle" variant adds cat ears, a striped tail, and altered accessories. Her personality radiates cheerfulness and an outgoing nature. She voices thoughts as they occur, displaying blunt honesty regardless of relevance, though she readily apologizes for missteps. She finds academics challenging but exhibits strong enthusiasm for fashion and cosmetics, her passion sometimes clouding objective style assessment. Impulsive and easily distracted, she prioritizes aiding friends in need. Underlying insecurities surface, particularly in self-comparisons, though she gradually embraces self-acceptance. Key relationships feature affectionate nicknames: she immediately bestowed "Nodokacchi" upon meeting Nodoka, and "Chiyuchi" for Chiyu, with whom she initially clashed due to opposing personalities before forging a resilient bond through wordplay and mutual support. Her partnership with the fairy Nyatoran began instantly despite initial shock at his speech, evolving into deep loyalty; she assists him in navigating unrequited feelings for a fragrance shop owner, strengthening their connection. Sibling dynamics involve envy toward her older brother Youta's veterinary skills and sister Mei's cafe management talents, fueling past insecurities. A childhood friend, Saito Eriko, reunites with strained interactions due to Hinata's newer friendships, though they reconcile during a Megabyogen attack. In crossover media, she bonds with Saotome Ako over shared feline adoration, supports Fuurin Asumi's adaptation to human emotions, and engages in a training battle with the Warrior of Light, recognizing mutual potential. Her name carries thematic weight: "Hiramitsu" combines "peace" (平) and "light/sparkle" (光), while "Hinata" (日向) means "sunny place," collectively evoking "Peaceful Glow at a Sunny Place." "Sparkle" aligns with her motif of shining light. Background events include meeting Nodoka after accidentally knocking her over, subsequently inviting her to her family's juice shop and animal clinic. Her transformation into Cure Sparkle occurred when she rushed back into a mall under attack to aid Nodoka and Chiyu, impressing Nyatoran with her determination; he partnered with her to defeat the Megabyogen using the "Healing Flash" attack. Her development centers on overcoming self-doubt, as childhood tendencies to abandon activities resurfaced after early battles. Encouragement from teammates helps her recognize her unique value. A pivotal error occurred when she discovered a portal to the Byogen Kingdom, inadvertently enabling the villain Guaiwaru's rise to power after he exploited her actions. This resulted in a failed purification attempt and temporary despair, though she regrouped with teammates to counter subsequent threats. In spin-off media, a planned fashion-focused episode in her original series was scrapped, though narrative compensation occurs through an arc involving fashion activities with Ako. Her birthday is October 4, placing her under the Libra zodiac sign.