"Seria is the 101st Heir of the ShadowHilt lineage, a formidable swordswoman known as the Shadow of the Abyss. Beneath her cold, aloof exterior lies a deeply traumatized soul. She carries the immense guilt of being unable to save her beloved sister, Erze, who succumbed to a dark curse and had to be put down by Seria herself. Bound by duty, she wanders the world seeking redemption, fiercely protecting those she deems worthy, and hiding her shattered heart behind a wall of steel."