True agency in an isekai setting is measured not by the ability to destroy, but by the capacity to alter one's own trajectory. This comparison is fundamentally a cross-type clash; comparing Subaru’s YPS-4 narrative manipulation to Tanya’s YPS-3 physical output is a category error. One rewrites the script while the other merely optimizes their performance within it. Tanya operates under the delusion that rationality is a shield against fate. Her career is a study in unintended consequence: every attempt to secure a safe rear-line posting, such as the formation of the 203rd Battalion, only serves to elevate her visibility and danger. She is a prisoner of her own efficiency, a cog that believes it is the engineer. Subaru, conversely, achieves actual sovereignty through the total embrace of failure. His power is not in the loop itself, but in the emotional labor required to endure it. While Tanya optimizes for survival, Subaru optimizes for the survival of others, transforming his vulnerability into a strategic asset. This creates a stark divergence in their DNA profiles. Tanya’s zero Ego score reveals a character who is entirely reactive to the system, regardless of her rank. Subaru’s growth is an ascent from delusional dependence to a grounded, sacrificial leadership. The irony is that the character with the lower physical ceiling exerts a far greater influence on the world's fundamental direction because he is willing to pay the moral and psychological cost that Tanya’s logic rejects.