The utility of a support character in isekai is often a mask for a crisis of identity. Because one operates on physical combat and the other on systemic authority, a direct YPS-2 comparison of their output is meaningless; physical force cannot clash with administrative law. Instead, the real tension lies in how they trade their selfhood for the stability of others. Rem treats her utility as a penance, viewing her strength as a way to compensate for being a defective substitute for Ram. Her low Ego score reflects a desperate need to be defined by her devotion to Subaru, turning her power into a shield for someone else's growth. Shiroe, conversely, treats his utility as a weapon. By adopting the persona of the Villain in Glasses, he weaponizes his zero Ego to become a transparent vessel for systemic order. While Rem suffers under the weight of her perceived inferiority, Shiroe leverages his invisibility to construct a civilization from the ruins of a game. This reveals a fundamental divide in how the genre handles non-protagonist power: Rem represents the tragedy of the servant who finds value only in submission, while Shiroe represents the burden of the architect who finds value only in orchestration. One fights to be seen as worthy; the other fights to remain the hidden hand. Their overlap isn't in what they can do, but in the psychological cost of being the indispensable foundation upon which others stand.