Part 5/9:
Entrusted with an ancient armband and locket, Seiya is urged to embrace his inherent powers to safeguard Sienna against Vander's ambitions. The narrative deepens as Sienna grapples with her own powers, leading to catastrophic visions that threaten the world. Meanwhile, Seiya undergoes rigorous training with the silver knight, where he learns the true potential of his Cosmo energy. With memories of his sister serving as a relentless motivation, Seiya steadily advances, ultimately gaining mastery over his powers.