Orsola Aquinas, a former nun-in-training of the Roman Catholic Church, devoted her early life to preaching in pagan nations and decrypting occult texts, most notably the Book of the Law—a grimoire wielding angelic-tier magic. Her mastery in unraveling its secrets provoked the Church’s persecution, driving her under the protection of the Anglican Necessarius while she clung steadfastly to her Catholic faith. With blond hair, piercing blue eyes, and a traditional unaltered habit accentuating her mature stature, she cuts a striking figure entwined in ecclesiastical strife. Her story ignited during a rescue mission entangled in clashes between the Roman Catholic Church, the Amakusa-Style Remix Church, and Necessarius. Initially perceived as a kidnapping victim, the Amakusa covertly shielded her from Vatican assassins. Kamijou Touma, Stiyl Magnus, and Index spearheaded her liberation, cementing her as a linchpin in magical faction rivalries. Kindhearted yet scatterbrained, Orsola’s meandering thoughts contrast her capacity for stirring oratory that bends hearts and decisions. She extended forgiveness to Agnese Sanctis and her cadre after their betrayal, embodying reconciliation even as she pragmatically critiqued institutional rot within her former faith. Rooted in childhood bonds with Agnese, Lucia, and Angelene—whom she once served olives—her past resurged when aiding their defection to Necessarius during the La Regina del Mare Adriatico crisis. Her cryptanalytic prowess remained indispensable, partnering with the abrasive Sherry Cromwell to dissect the Croce di Pietro during the Daihasei Festival. Survival tested her repeatedly: Roman Catholic assassins stalked her relocation to England, thwarted by Touma and the Amakusa; she navigated Academy City’s tech-driven chaos, humorously grappling with a sentient washing machine alongside Kanzaki Kaori. A darker trial emerged when a Divine Mixture with Isis-Demeter transformed her into a vessel for plant-based sorcery, triggering destructive frenzies halted only by Touma’s intervention—a stark reminder of power’s ethical perils. Through turmoil, her speeches steered factions toward unity, urging Necessarius to prioritize compassion over politics. Trusted deeply by Touma and fostering uneasy alliances like that with Sherry, she mentored the Amakusa in battles such as against Acqua of the Back. Balancing Catholic devotion with Anglican collaboration, Orsola emerged as both mediator and symbol, her faith unshaken by the tempests of divine and mortal intrigue.