The fundamental tension of the "hidden power" trope is not about the scale of the ability, but about whether that power serves the self or erases it. Comparing a YPS-3 physical combatant to a YPS-5 authority-user is a categorical error; the distance between city-level destruction and continental erasure is too wide for combat analysis to hold value. The real friction lies in their opposing relationships with agency. Cid Kagenou treats his abilities as a stage prop, using his atomic detonation not for strategic victory, but to validate a specific aesthetic of the "mastermind." His high Ego is fueled by the gap between his perceived roleplay and the actual geopolitical shifts he triggers. Conversely, Mile is a prisoner of her own scale. Her power is a constraint that forces her into a state of permanent self-effacement. While Cid builds an empire through Shadow Garden based on a delusion, Mile’s existence is a delusion forced upon her by a cosmic mistake. One uses a mask to find meaning, while the other uses a mask to survive the burden of existence. This reveals that in isekai, a high YPS tier often functions as a narrative cage rather than a tool for liberation.