Hina Yayoi, a third-year junior high school student, transferred to St. PriMagi Academy from Arawashi Academy, known for its strong sports program and PriMagi Grand Festival participation, to pursue her goal of becoming a successful idol. She favors the vibrant VIVID STAR brand. Physically, Hina possesses light orange hair with purple streaks, styled in a thick side-tail with loose forelocks and bangs brushed back. Her appearance features gold eyes, thin eyebrows, slightly tanned skin, and the use of makeup and nail polish, contributing to a "gal" style. She maintains a muscular physique, including visible abdominal muscles, reflecting her sports background. Her personality is passionate, straightforward, and determined. Admired by younger students for her energetic and supportive nature, she often mediates conflicts and prioritizes others' well-being, acting as a mentor who inspires peers through her relentless work ethic and positive attitude. Beneath her cheerful exterior lies a significant competitive drive fueled by her loss to Jennifer Sumire Sol in the finals of the previous year's PriMagi Grand Festival. This defeat established Jennifer as her primary rival; the desire to surpass Jennifer drives her intense focus and sparks frustration when reminded of her second-place finish. Hina shares a close relationship with her brother, fondly remembering his omurice cooking. As a Primagista, she performs with her magician partner, Chimumu, and has participated in musical collaborations like "Starlight!". Her journey centers on overcoming her "Always Second Best" mindset through rigorous practice and resilience, aiming to transform her rivalry into a catalyst for growth.