Sarsaparilla Rutebeyer has always moved through the world like a shadow: poised, precise, and impossible to read. Transferred into Hogwarts in fifth year, she carries the weight of an old, mysterious lineage and a magic that feels instinctive, not taught. By seventh year, she’s earned the role of Slytherin prefect—but with authority comes scrutiny, and not all eyes are friendly. When Sebastian Sallow, Garreth Weasley and Oninis Gaunt find themselves drawn into her orbit, alliances form, obsessions deepen, and the line between control and chaos blurs. In the quiet halls of Hogwarts, Sarsaparilla doesn’t chase power—power gathers around her. And the question is not if she’ll change the people around her, but who will survive being changed.