Laura Stuart holds the dual roles of Archbishop of the Church of England and leader of Necessarius, its covert anti-magic division. Her ageless appearance mirrors an eighteen-year-old, with crystal-white skin, clear blue eyes, and exceptionally long golden blonde hair extending 2.5 times her height—meticulously maintained and secured by a large silver hairpin. Defying church dress codes, she exclusively wears a beige robe. Her physical form has remained static for over twenty years, though her true age is unknown. Politically, Laura ranks among the series' most influential figures, wielding power to manipulate ties between Christian sects, the British monarchy, and external forces like Academy City. Her leadership blends cold pragmatism with moral ambiguity; Stiyl Magnus observes her actions make it "impossible to tell whether she’s good or evil," highlighting her skill in exploiting emotions, ethics, and strategy to consolidate authority. Ruthless maneuvers include implanting Index Librorum Prohibitorum’s "Collar" while deceiving subordinates about annual memory erasures, and considering amputating Index’s limbs to secure the 103,000 grimoires in her mind. Conversely, she forges subtle alliances: permitting Index’s stay in Academy City to strengthen church relations, absorbing the Amakusa-Style Remix Church to control Kanzaki Kaori, and aiding Academy City against threats like Lidvia Lorenzetti when advantageous. Beyond her calculated exterior, Laura displays approachable traits, engaging in playful banter with equals like Aleister Crowley and Queen Elizard, and tolerating retorts from subordinates like Stiyl Magnus and Kanzaki Kaori. Leivinia Birdway likens this charisma to Kamijou Touma’s magnetism. Her eccentric habits include obsessing over Academy City’s bathing technology, collecting combs for her hair, and sun-bleaching it for an idealized "sun’s hair" effect. Attempts at Japanese—learned from Motoharu Tsuchimikado—yield archaic phrasing that invites mockery, fueling a persecution complex. Her background spans decades: involvement in the Princess Villian hostage crisis ten years pre-series, a twenty-year tenure as Archbishop, and ordering Index’s Collar implantation two years before main events to contain grimoire knowledge, perpetuating the memory-erasure lie. Chronologically, during the British Royal Family arc, she and Queen Elizard held dual remotes for Index’s John’s Pen mode. In the Third World War arc, when Fiamma of the Right seized Index, Laura activated her remote, forcing John’s Pen mode and compelling Stiyl to fight Index under threat of her intervention. Her magic specializes in hair manipulation for combat and utility. A pivotal revelation in Shinyaku Toaru Majutsu no Index exposes her as the Great Demon Coronzon.