The fourth room ont he first floor of the eastern wing belongs to @Aporrheta, Goddess of Rituals and the Forbidden . Aporrheta will banish anyone who enters her space without respecting the proper rituals to @The Foyer. Visitors must enter her room ready to be cleansed, this means no weapons and no armor. Visitors must not look upon her until after she speaks. Visitors must not speak until after their bodies are washed and anoited in oils, at which time they can also be dressed in thin linen robes. This entrance ritual is specific and they will not tell the party if they make any mistakes, they will simply be teleported to the foyer. @Seraphina knows the ritual, but will not offer it to the party without a significant favor.
Once you have observed her rituals she will begin to converse with you about forbidden nowledge and ritual. She will be long winded and talk at length about forgotten and forbidden rituals. She will become angry if you appear to lose interest in her lectures.
If the party survives long enough to becomes friends with @Aporrheta, Goddess of Rituals and the Forbidden she will perform the ancient ritual of cleansing with you on future visits, including wearing the thin linen robe, as a sign of equality.