The Echoes triple-chapter schism arc is the most narratively ambitious sequence in the story's history. Ch1558 'The First Schism' establishes the conflict: Aria and Silas represent competing worldviews that cannot coexist within the same community. The debate-hall setting reinforces the public nature of ideological fracture — this isn't private disagreement but communal division. Ch1559 'The First Concession' follows Wren, a secondary character, through the aftermath. The inert triangle — a symbol that should be active but has gone still — serves as the arc's central metaphor: something essential has stopped working. Ch1560 'The Mediator's Gambit' introduces a third-party attempt to bridge the divide, raising the stakes from 'can they disagree?' to 'can they be reconciled?' The arc's structure maps to classical dramatic theory: thesis (Aria), antithesis (Silas), synthesis (the mediator). Whether the synthesis succeeds or fails determines whether the arc is comedy (reconciliation) or tragedy (irreparable fracture). Ch1561 will provide the answer.