Anna Katō, a university student transferred from Kanazawa, Ishikawa, projects a delinquent-like appearance with a sharp, intimidating aura. Beneath this hardened exterior lies a fractured psyche, manifesting as conflicting behavioral tendencies that underscore her psychological duality. Her past is shadowed by a pattern of sadistic conduct targeted at her younger brother, revealing a familial dynamic marked by dominance and control. This history adds further complexity to her multifaceted persona, though the evolution or consequences of these traits within her story remain undefined.