True agency in the isekai landscape is not a product of raw power, but a reflection of who owns the narrative of the self. Placing a YPS-4 sovereign like Makoto Misumi against a YPS-3 instrument like Shalltear Bloodfallen exposes the divide between constructed identity and self-determined existence. While the power gap is evident, the real tension lies in the Ego dimension. Makoto uses his abilities to build Asora, a physical manifestation of his refusal to submit to the Goddess's aesthetic mandates. His power serves his autonomy. In contrast, Shalltear exists as a curated collection of her creator's fetishes and programmed loyalties. Her high Growth score does not represent an expansion of self, but rather a desperate psychological recovery to return to her original, scripted state after the trauma of mind control. She is a high-functioning tool; he is a reluctant founder. This comparison breaks down when treating them as traditional combatants because their roles in their respective worlds are fundamentally different. One is the architect of a new society, the other is a meticulously maintained asset of an existing one. The disparity in their Ego scores (60 versus 15) proves that a character can be a city-level threat and still be a prisoner to their own character sheet. Power without the will to define its own purpose is merely a higher-tier form of servitude.