The Roswell Pentimento manifests as a translucent disc with internal layered structures resembling ancient paint layers. It emits a soft golden glow in alignment with the series' secondary color (#D4AF37). Its internal luminescence pulses when bag tag transfers occur nearby, and it contains geometric patterns that shift based on competitive observations.

The Roswell Pentimento serves as the cosmic archive of the Wednesday Johnny League - when a player takes a bag tag, the Pentimento records the transfer, preserving the ghostly traces of all previous holders within its layered surface. It determines which players become permanent brushstrokes in the Grays' eternal masterpiece and which fade into the gray obsolescence of footnotes in the Roswell Codex.