Lady Shadowthorn is known to be an avid collector of the archaic and occult, to gain an audience with her it would be wise to bring a gift or offering.

Eris is rumoured to be a Witch or some kind of Druid that tangles nature magic with that of life and decay.
She is also rumoured to be the only person well-versed in the region's rare and exotic herbs capable of identifying poisons and diseases and creating potions and remedies for all sorts of cursed maladies.
Perhaps you are afflicted with something, your desperation drives you to seek out the Witch in the old forest hunting lodge that was converted into a manor in ages past.