Nozomi Fujimiya is a high school student from Kazune city with a slender build, standing 163 cm tall and weighing 50 kg. Her pale complexion contrasts with long, straight blond hair typically pulled into a ponytail featuring spiky bangs and secured by a ribbon hair tie; her eyes are brown. She regularly wears a sailor school uniform, ankle boots, and a body ribbon, and occasionally appears in a swimsuit.

Working as waitstaff at the "One Day" café alongside her adopted sister Wakaba Fujimiya, Nozomi displays a sociable nature, forming friendships through her interactions—including with regular customer Makoto Okano. Despite her outwardly energetic and lively demeanor, she suffers from a severe congenital heart condition that causes frequent collapses, leaving her in fragile health near death. Wakaba stabilizes her with healing abilities, though Nozomi carries guilt over burdening her sister.

Nozomi exhibits a tomboyish personality marked by bravery, kindness, protectiveness, and humor, alongside a noted love for sweets. She engages in athletic activities like volleyball and excels in kendo, wielding a katana. As a Kazune resident, she possesses a special ability tied to bladed weapons: generating destructive shockwaves over several meters, referenced in some sources as "strength."

Adopted into the Fujimiya household, she shares a close bond with Wakaba—who is biologically related to Minamo Narukaze and Hinata Okano. Despite health limitations, Nozomi participates in school activities, including a play during the school festival.