Agency in the isekai genre is often framed as a reward for power, but for these two, power is the very mechanism of their imprisonment. The YPS-3 classification masks a fundamental divide: Beatrice operates through the conceptual rules of Authority, while Tanya utilizes the physical application of combat magic. This cross-type gap renders a direct combat comparison meaningless; instead, their value lies in how they navigate structural constraints. Beatrice spends centuries in a self-imposed purgatory, her arcane knowledge useless against the psychological weight of waiting for "That Person." Her arc is a transition from a passive object of a promise to an active participant in the Emilia Camp, proving that her true growth is the reclamation of her Ego. Tanya, conversely, views the world as a series of corporate optimizations. She attempts to use her rank to secure a safe rear-line posting, yet every tactical victory only tightens the military's grip on her. While Beatrice finds freedom through emotional vulnerability and a bond with Subaru, Tanya finds herself increasingly enslaved by her own efficiency and the systemic inertia of the Empire. One escapes the void through the courage to be fragile; the other sinks deeper into the machine through the refusal to be human.