WorldEnd #EX collects side stories centered on the people who have carried Seniorious, one of the most powerful Dug Weapons. Across different eras, figures including Lillia Asplay, Chtholly Nota Seniorious, and Lakhesh each bear the blade while facing the grim expectations placed on faerie soldiers and their predecessors. The stories expand the main series through memories, quieter moments, and perspectives on young fighters who continue to imagine ordinary futures even when their role in the world seems to deny them one.