Now that Aoi and the others are safely back in the house that sits between the human world and spiritual realm, Aoi has something to share with Himari about her rightful place there.
It must be the author of 
the diary and her husband.
لا بدّ أنّها كاتبة المذكّرة وزوجها
Si je ne m’abuse,
Devono essere l'autrice del diario e suo marito.
Deve ser a dona do diário e seu marido.
Полагаю, это хозяйка дневника и её муж.