Stiyl Magnus serves as a magician within the Anglican Church’s Necessarius, wielding mastery over rune and fire magic. Two years before the central storyline, he partnered with Index Librorum Prohibitorum and Kaori Kanzaki on a global mission to catalog grimoires locked in Index’s mind. Their bond fractured when the Church enforced annual memory wipes to prevent her brain from overloading—a duty Stiyl and Kanzaki carried out with reluctant anguish. To shield Index from further pain, they concealed their motives, letting her believe them enemies. This deception later drives Stiyl to pursue her to Academy City, where his clash with Kamijou Touma ignites an adversarial first meeting. Despite his 14 years, Stiyl’s towering 200 cm frame, shoulder-length blond hair dyed crimson, and a barcode tattoo beneath his right eye lend him an imposing maturity. Silver rings adorn his fingers, paired with earrings and a black priest robe. A habitual smoker, he openly scorns areas banning cigarettes. His magic’s immense energy drain leaves him physically frail, vulnerable in direct confrontations. Runes form the core of his craft, channeled through laminated cards for swift incantations. He conjures flame swords blazing at 3000°C, heat-warped mirages for illusions, and barriers to repel foes or sever communications. His pinnacle spell, Innocentius, summons a regenerating fire giant bound to rune-marked zones—a formidable yet preparation-dependent tactic. Cigarette smoke doubles as a tool for message transmission or psychological analysis, blending pyrokinesis and runes for combat and reconnaissance. Quick to anger yet fiercely protective, Stiyl harbors guilt over Index’s memory loss. He begrudgingly admires Touma’s determination to guard her, their interactions oscillating between hostility and uneasy camaraderie. Loyal to Necessarius, he clashes with superiors like Laura Stuart, chastising her whims when they jeopardize missions. Beneath his abrasive demeanor lies a resolve to defy Church mandates if needed to safeguard Index. Evolving from foe to conflicted ally, Stiyl refines his rune tactics to challenge Touma’s Imagine Breaker, aiding against supernatural threats. His past includes altering Aureolus Izzard’s visage via burn-healing magic and engaging in perilous operations across occult factions. These trials weave a narrative of sacrifice and redemption, balancing his ecclesiastical duties with the fragile bonds forged through shared hardship.