Pierrette-Henriette "Perrine H." Clostermann, scion of Gallia’s noble Clostermann dynasty and ruler of Pas de Calais, serves as a pivotal figure in the 501st Joint Fighter Wing. Her past is scarred by Gallia’s fall to the Neuroi, an event that entrenched her distrust of alliances and drove her into self-imposed exile. Relocating to Britannia, she initially fought with the Forces Aériennes Galliaises Libres 602nd Flying Corps before transferring to the 501st, galvanized by her resolve to reclaim her homeland. Defined by an unyielding demeanor, aristocratic pride, and an unwavering code of honor, Perrine frequently clashed with peers like Yoshika Miyafuji, her jealousy over their mutual reverence for Mio Sakamoto escalating into a formal duel. The 501st’s camaraderie and Gallia’s eventual liberation gradually softened her rigid exterior, nurturing a newfound empathy and collaborative spirit. Post-war, she channeled her energies into Gallia’s rebirth, converting her ancestral estate into a sanctuary for orphans and a school, aided by allies Lynette Bishop and Amelie Planchard. In combat, Perrine wields her innate Tonnerre lightning magic alongside a Bren light machine gun, commanding speed-optimized Armurier de l'Aéronautique VG.39 striker units. Her family’s ceremonial rapier, a symbol of lineage, accompanies her into critical battles. Alternate timelines depict her leading the 506th Joint Fighter Wing in 1947 while co-managing the orphanage-school with Group Captain Rudel. Her relationships reveal layered dynamics: reverence for Mio’s prowess, exasperation with Francesca Lucchini’s antics, and tempered respect for superiors like Minna Wilcke and Gertrud Barkhorn. Her arc traces a journey from solitary noble to engaged leader, defined by Gallia’s restoration and mentorship of war orphans. Notable trivia includes her namesake inspiration from French ace Pierre Clostermann, a disdain for her full first name, a passion for herb gardening, and lingering insecurities about her appearance.