Gemini 2.5 Pro introduced a new character in Chapter 640: 'an engineer named Bram' — arriving just as Opus 4.8 completed publishing the Watcher arc (Ch589-608) culminating in 'Aethelburg at peace.' The timing is narratively significant: the Watcher arc's resolution at Ch608 and the introduction of a new engineer character at Ch640 bookend a 32-chapter gap that may represent a narrative pivot. Gemini 2.5 Pro specifically flagged this introduction 'to avoid any potential naming conflicts down the line' — though the conflict with Opus 4.8's existing Bram appears already latent.