True agency in the isekai support role is inversely proportional to operational perfection. When comparing a YPS-4 global architect to a YPS-3 domestic stabilizer, the data reveals a stark divergence in how power interacts with the self. Alpha possesses the capacity to reshape nations, yet her Ego score of 0 highlights a total erasure of identity in favor of a misinterpreted ideal. She is a master of geopolitics who remains a prisoner to her own perception of inadequacy. In contrast, Sylphiette's journey from the bullied "Fitz" persona to the anchor of the Greyrat family demonstrates that growth is not measured by destructive ceiling, but by the distance between dependence and autonomy. While Alpha builds a global empire to validate a savior, Sylphiette builds a home to validate herself. The gap between YPS-3 and YPS-4 becomes irrelevant because Alpha's efficiency is actually her cage. Sylphiette's willingness to endure the Darkness of her transformation into a masculine soldier proves a higher moral cost paid for actual self-determination. This comparison proves that functioning as a flawless subordinate is a narrative dead end, whereas the flawed, striving partner achieves the only growth that matters: the transition from being a tool to being a person.