Fiana Isphil, who is also referred to as Fianna Isphil or Philia in some materials, is the central protagonist of the story. She comes from a family that has produced Saints for generations, and she herself is recognized as the greatest Saint of her time. Initially, Fiana lives in her homeland and is the fiancée of the second prince named Julius.

Fiana’s personality is defined by her being the epitome of a perfect Saint, a status that unexpectedly becomes a source of conflict. Her fiancé, Prince Julius, perceives her flawlessness as charmless and unlikable, leading him to publicly call off their engagement. Rather than simply ending the relationship, the situation escalates as Fiana is then packed off and effectively sold to a neighboring kingdom in exchange for gold and resources, forcing her to abandon the only home she has known. This backstory establishes her as a character who is discarded and betrayed by her own people despite her immense value and virtuous nature.

In terms of her role in the story, Fiana is sold to another kingdom where she braces herself for mistreatment, expecting a harsh reception in her new environment. However, contrary to her fears, she finds a warm welcome in her new town. Her primary function in the narrative is to utilize her powerful saintly abilities for the benefit of this new community. She puts her powers to practical and benevolent use, notably by erecting protective barriers against monsters and curing widespread epidemics. Her actions allow her to flourish in her new life, even as her neglectful homeland begins to face a grave threat of destruction.

Regarding her key relationships, the most critical one is with her former fiancé, Prince Julius, whose rejection is the catalyst for her entire journey. The story also focuses on her developing connections with the people of the kingdom she is sold to, who treat her with a kindness she likely did not anticipate. Her development arc is defined by this transition from a discarded and objectified political pawn into a cherished and vital figure in a new land. The betrayal she suffers does not embitter her; instead, she continues to embody the role of a Saint, using her notable abilities for healing and protection, which earns her the acceptance and appreciation that her original home denied her. Her notable abilities are explicitly those of a Saint, including the power to create barriers against monsters and to heal or cure diseases.