Jasmine St. George attends the College as a member of the same class cohort as Chise Hatori and Beatrice Byrne. She hails from the St. George family, descendants of the legendary dragon slayer Saint George, historically known as "Slayers of Beasts." This formidable heritage burdens her with significant expectations and strictly governs her conduct and decisions.

Acting from earnestness and a powerful sense of familial duty, Jasmine dons masculine attire. She makes this choice deliberately to counterbalance criticism directed at her brother, who persists in wearing women's clothing against their family's wishes. Her constrained life under this obligation is further evident in her disapproval of Rían Scrimgeour's attempts to renounce his own family legacy.

Jasmine shares a deep bond with her twin sibling, Violet St. George, and the pair traverse the College halls side by side. Her established role underscores the pressures of magical lineage and the personal sacrifices demanded by family tradition, contributing to the series' exploration of heritage versus individual identity within the academic setting.