Growth in isekai narratives often masquerades as a linear climb in power, but the contrast between biological evolution and psychological rehabilitation exposes the true cost of change. While Filo carries a maximum Growth score, this trajectory is an externalized metamorphosis from a mindless creature to a sentient companion. Her development is a byproduct of her bond with Naofumi, reflected in an Ego score of zero; she does not choose to grow, she is grown. This is the purity of the tabula rasa. Comparing a YPS-2 Awakened entity to a YPS-4 Nation Level mage creates a functional void in combat analysis, but it illuminates a psychological divide. Rudeus does not evolve; he rehabilitates. His growth is a grueling process of scrubbing away a failed previous life, a struggle evidenced by a Darkness score that Filo entirely lacks. Where Filo’s growth is additive and effortless, Rudeus’s is subtractive and painful. He fights his own nature to become a father and husband, whereas Filo simply accepts her new form. The tension here lies in the paradox of agency. The character with the absolute growth trajectory has no will of her own, while the character with the strategic power to reshape nations is held hostage by the social anxiety of a thirty-four-year-old shut-in. This comparison reveals that in the Yisekai ecosystem, the highest growth scores often belong to those who surrender their identity entirely to another, while the powerful characters remain trapped by the ghosts of who they used to be.