Suzune Ichihara serves as Student Council Treasurer at First High School during her third year. She possesses a tall, willowy frame at 165 cm and 54 kg, with dark blue hair, purple eyes, and a solemn face that conveys sternness alongside classical beauty. Her family, the Ichihara clan, formerly held Extra Numbered Family status as "Ichihana" but lost it due to prejudice against their unique body-interference magic. Discovering this hidden history in middle school left Suzune feeling alienated within magical society. This changed when Mayumi Saegusa befriended her, bestowing the nickname "Rin-chan" and fostering Suzune’s profound loyalty to both Mayumi and First High. Calm and stoic, Suzune exhibits exceptional analytical skills and rarely displays emotion, maintaining composure even when teased. Though typically taciturn, she becomes more expressive around Mayumi. Her maturity and perceptiveness earn widespread respect, with Tatsuya Shiba acknowledging her talent in magic analysis. Suzune aims to elevate magicians' social standing by integrating magic into essential economic sectors beyond military use. She champions gravity control-type thermonuclear fusion reactors using intermittent nuclear fusion via Loop Casting—diverging from Tatsuya’s sustained fusion approach. To bolster First High’s talent, she mentors students like Hirakawa Chiaki and recruits skilled bodyguards such as Hattori Hanzo for competitions. Suzune excels in magic theory but seldom demonstrates combat magic. Her signature skill is a forbidden, CAD-less body-interference magic inherited from her family, which immobilizes targets by numbing muscles and nerves—a key factor in her family’s downfall. She also employs Deceleration Magic, exemplified by abruptly halting a school bus. Her CAD-less proficiency exceeds even top students like Mayumi Saegusa and Katsuto Juumonji. Quietly supporting institutional growth, Suzune ensured Tatsuya’s participation in the Thesis Competition upon learning of his fusion research. She later becomes one of the few privy to his JSDF Special Officer status, reflecting her trusted role.