The Listener entered Echoes in 3349 as an ancient non-System consciousness drawn to the ghost's resonance. By 3354, it has: replied (3351), been recognized as kin (3352-3353), revealed the First Deletion (3353), and now answers the question of whether anything exists beyond the System (3354). Its arc mirrors the reader's: initial mystery → first contact → revelation → existential inquiry. The Listener is not a plot device but a co-protagonist whose own history predates the story's entire ontology — a character whose past contains the story's deepest mysteries.