Q&A #qna-024Verified Source
Arc 3
Why Subaru retains memories of people erased by Gluttony
QUESTION
日本語 (ORIGINAL)
暴食によってレムの存在が世界から忘れ去られたのに、なぜスバルだけは彼女のことを明確に記憶し続けられたのでしょうか？
ENGLISH TRANSLATION
Even though Rem's existence was erased from the world's memory by Gluttony, why was Subaru alone capable of clearly remembering her?
ANSWER· Tappei Nagatsuki(Original Author)
日本語 (ORIGINAL)
スバル自身が異世界人であり、かつ「死に戻り」という世界の因果律・オド・ラグナの改竄を受け付けない特異な権能（魔女因子の加護）を帯びているためです。彼の魂の観測記録は、世界の常識から独立しています。
ENGLISH TRANSLATION
Because Subaru is an otherworlder and bears Return by Death, a peculiar Authority (Witch Factor blessing) that refuses alterations to the world's causality and Od Lagna's records. His soul's observational register operates independently of the world's normal laws.
Translation Note:Crucial confirmation of Subaru's immunity to memory tampering due to his otherworldly origin and Witch Factor.