True agency in isekai narratives often inversely correlates with raw destructive capacity. While a YPS-5 entity possesses the ability to devastate continents, that level of innate dominance frequently results in narrative stagnation. Diablo exemplifies this paradox; as a primordial, his power is a static constant, leaving him with a Growth score of only 20. He finds fulfillment not in the expansion of his own will, but in the meticulous execution of another's desires, effectively trading his ego for the role of a high-functioning butler. His existence is defined by a voluntary submission that renders his massive power a mere tool for administrative stability. In contrast, Eris operates at a YPS-3 level, which is functionally insignificant when placed beside a primordial, yet her narrative trajectory is far more dynamic. Her decision to leave the person she loves because she perceives herself as inadequate is the ultimate expression of ego and self-determination. Where Diablo accepts his nature as a given, Eris rejects her current self to forge a new identity through grueling effort. The comparison breaks down in a direct confrontation—the gap between city-level and continent-level output is an unbridgeable chasm—but it reveals a critical truth about character architecture. The struggle for competence is a more potent engine for development than the mastery of it. The disparity in their Growth scores proves that the most compelling arcs belong to those who lack everything, rather than those who already possess the world.