The tension between programmed loyalty and chosen devotion reveals the fundamental divide in how isekai treats the servant archetype. Because Demiurge operates on an axis of authority at YPS-4 and Rem utilizes physical combat at YPS-2, any direct power comparison is irrelevant. Instead, the meaningful contrast lies in their DNA profiles regarding Growth and Ego. Demiurge represents the horror of the static servant; his efficiency in dismantling nations and managing the Sorcerer Kingdom is a pre-installed feature, not a personal achievement. He does not evolve because he is already the optimized version of his creator's will. Rem, conversely, embodies the struggle for self-determination. Her transition from a lethal antagonist to Subaru's emotional anchor is a violent psychological climb, evidenced by her high Growth score. While Demiurge views human life as raw material for scrolls, Rem views her own life as a disposable asset until she learns to value herself outside of her sister's shadow. One character uses loyalty to erase the individuality of others, while the other uses loyalty to discover her own. This creates a stark dichotomy: Demiurge is a master of the world who is a slave to his nature, whereas Rem is a servant of the house who fights to become the master of her own heart.