Akiha Byakko is a teenage student distinguished by her long brown hair, reaching at least waist-length, featuring blunt bangs, an ahoge, sidehair, and hair intake, paired with striking red eyes. Visible tattoos mark her form. Her attire includes a school uniform, a maid's dress with headdress, detached sleeves, fingerless gloves, boots, thigh-high stockings, shimapan, a mini-dress, and a ribbon tie.

She belongs to the Byakko bloodline, one of the Four Guardians historically tasked with protecting the western gate of the capital, alongside Seiryuu (east), Genbu (north), and Suzaku (south), representing their setting's strongest protectors. Akiha's existence is intrinsically linked to preserving her bloodline's divine power, a duty shared among the modern heirs of all four guardian lineages. This obligation necessitates bearing children to prevent the extinction of their inherited supernatural abilities, making the subject of pregnancy relevant to her character in fulfilling this inherited duty. She is the main character in the visual novel "Haramasete Seiryuu-kun! ~Jinginaki Onna no Tatakai~".