Translations:Th07/characters setting.txt/86/en

The reason Yuyuko can neither reincarnate nor vanish is because of the seal on the Saigyou Ayakashi. Once the boundary is breached, the time that was frozen will continue to flow, resulting in her death again. Reviving the corpse will destroy Yuyuko's ghost, so it's no wonder that the near-success of the revival ended in inevitable failure.