True agency in isekai narrative is inversely proportional to YPS ranking. Comparing a YPS-2 physical combatant to a YPS-S authority figure is a categorical error because their abilities operate on different planes; one fights the world while the other manages it. The real divergence lies in the relationship between power and identity. Rem’s value is derived from her friction—the grueling psychological climb from a self-loathing substitute to a woman who defines her own loyalty. Her Growth score is earned through the Darkness of her trauma and the fragility of her Bonds. Conversely, Touya represents the erasure of the self. His YPS-S status is not a result of effort, but a baseline of existence that removes the need for an Ego. By solving every conflict through divine authority, the narrative strips him of the capacity for internal change. While Rem struggles to find a self independent of her sister, Touya has no self to find; he is a benevolent void, a placeholder for the reader's desires. This reveals a fundamental truth about the genre: when a character transcends the scale to become a deity, they cease to be a protagonist and instead become a piece of infrastructure. Rem is a character because she can fail; Touya is a system because he cannot.