Flora Sánchez is the elder daughter of Duke Sánchez, the kingdom's prime minister, and the older sister of Carolina Sánchez. As a member of a powerful noble family, she has been raised in a privileged environment where her natural talents in holy magic have been nurtured and celebrated since childhood.

Flora is widely regarded as a prodigious mage whose immense holy magic has marked her as the presumptive candidate for the next Saint. Her public persona is meticulously cultivated to present the image of a gentle, kind, and virtuous young woman who embodies the ideal of sainthood. Those who know her only through social functions and public appearances see her as the perfect daughter and a loving older sister who always comes to Carolina's defense. This carefully constructed exterior has earned her widespread admiration and respect throughout the kingdom.

However, this saintly image stands in stark contrast to Flora's true nature behind closed doors. For the entirety of her younger sister's sixteen years, Flora has systematically subjected Carolina to cruel emotional abuse and psychological torment. She blames Carolina directly for their mother's death during childbirth, using this tragedy as a weapon and as justification for her campaign of cruelty. Flora has dedicated herself to making Carolina miserable, constantly reinforcing the idea that her sister is a family disgrace, a failure, and a disappointment to everyone.

Flora has taken full advantage of their father's frequent absences from home due to his duties as prime minister. With no one to intervene or witness her true behavior, she has been able to isolate Carolina and systematically shatter her self-esteem without consequence. Her manipulations extend beyond simple cruelty; she strategically maintains her spotless reputation while ensuring that Carolina remains marginalized and believes herself to be worthless. The manga adaptation visually conveys this duality through subtle artistic choices, giving Flora a smile that carries a cruel edge perceptible only to observant viewers.

Flora's core motivation is deeply tied to preserving her status as the recognized Saint-apparent and upholding the legacy of her mother. Her pride is immense, and the prospect of losing her position or being exposed as an abuser drives her actions throughout the story. When Carolina is sent to the Malcosian Empire for a political marriage to Prince Edward Ruby Martinez, Flora's influence does not diminish; Carolina continues to carry the ingrained fears and low self-worth that her sister instilled in her.

As the story progresses and Carolina's latent holy powers begin to emerge within the empire, Flora's role expands from family oppressor to a broader antagonist. Upon learning that the Malcosian imperial family plans to expose her manipulation through a public spectacle, Flora escalates her efforts to destroy her sister. Her pride and desperation lead her to instigate a direct confrontation during a grand tournament, where she aims to publicly discredit Carolina and secure her own position as the recognized Saint once and for all.

Flora's abilities center on her immense reserves of holy magic, which have been recognized as far surpassing normal standards. This prodigious magical talent forms the foundation of her public reputation as the heir apparent to the role of Saint. She uses her magical prowess not only to maintain her status but also as a means of reinforcing the disparity between herself and her supposedly talentless younger sister. Her power is genuine, which makes her deception all the more effective and her eventual confrontation with Carolina a clash of significant magical force.