Sonoka Watarai, a 14-year-old Valkyrie stationed at Tateyama Base, enlisted in the war against the Pillars at 11. Her pink hair cascades into twin low braids, contrasting her crisp black-and-white uniform. Though reserved and courteous off-duty, her reckless tactics in combat have branded her the squadron’s most daring pilot. Her history intertwines with veteran Yayoi Amatsuka, their bond fractured when Yayoi forcibly grounded Sonoka’s aircraft to shield her mid-mission—an act that doomed Yayoi’s entire squadron. Resentment lingered until Yayoi’s death during a retreat from the failed assault on the Fuji Pillar. Witnessing Yayoi’s final sacrifice and reevaluating her own motives, Sonoka rekindled her resolve. This transformation crystallized when she shielded a laboring mother during a Pillar strike, cementing her vow to protect others. She commands a magically augmented Macchi M.C.72, retrofitted for anti-Pillar warfare. Her given name, Sonoka, blends “garden” and “fragrance,” while Watarai, her surname, denotes “arrival.” A seasoned veteran despite her youth, her evolving resilience anchors her team’s struggle against annihilation.