Noé learns Naenia took Chloé's true name. Chloé's past and the d'Apchiers' history come to light, including her friendship with Jeanne, the Alteration Engine, and Ruthven's friendship with Chloé, which he shattered by trying to take the engine research.
A key element in
researching the World Formula
العنصر الأساسي في البحث حول صياغة العالم
Die zentrale Frage
bei der Erforschung der Weltformel
Un elemento clave en la investigación
de la Fórmula del mundo
Algo esencial al analizar
la Fórmula Mundial
L’élément essentiel
de nos recherches
La cosa più importante negli esperimenti 
sulla Formula del Mondo è il mezzo che si usa per alterarla.
Um elemento-chave
na pesquisa da Fórmula Mundial
При исследовании
структуры мира важно решить,