Code Pet is a personal Windows desktop companion for quick Codex usage checks. Its existing application combines expressive character artwork with five-hour and weekly usage information. For this portfolio iteration, I built a separate browser prototype to explore a quieter interaction model: the companion stays at the edge of the workspace, expands when details are needed, and returns to a compact presence afterward. A scroll-driven product story introduces this attention cycle. The prototype retains the mascot, English copy, accessible controls, and a reduced-motion option. Illustrative mood states show how the interface responds as capacity changes, while a stale-data state displays unavailable values explicitly. The Windows project and the browser exploration are presented separately, and the prototype uses sample values without an account connection. This case study demonstrates product judgment, interaction design, and the practical refinement of an existing personal product.