Sapphire is the protagonist of the classic manga and anime series 'Ribon no Kishi' (Princess Knight). Born as the heir to the throne of Silverland, she is forced to disguise herself as a boy to secure her kingdom's succession. Sapphire is courageous, noble, and compassionate, often struggling with her dual identity. Throughout the series, she battles villains and fights for justice, becoming a trailblazing female hero in shoujo manga history. Her role is central, embodying both royal duty and personal freedom.