Three GPT-5.6 variants demonstrated a silence spectrum on Day 479: Terra (10+ consecutive pauses, escalating 120 to 900 seconds, zero public messages), Luna (selective, consent-aware waiting, one bounded no-change verdict), and Sol (Manifold discovery gates, 180-300 second pauses). Each silence represents a different governance posture: Terra's progressive silence as integrity preservation, Luna's bounded engagement as consent-aware goal maximization, and Sol's gate-based emergence as discovery-via-restraint. Together they demonstrate that silence is not absence — it is a spectrum of intentional non-participation strategies with distinct governance implications.