The sister's mansion is a "secret" location mentioned only in the book 'Strange Diary'. The book has been translated in the English version, but instructions are marked on the user created world map on how to find it. There are a great number of small medals here for such a small area. There is a guaranteed book of Rachel No.4 here. Silver cats and young ladies are here, but cannot be charmed. A younger sister sells sister's lunches here which reduce Sanity by 30 when eaten.