From Flexible Survival
The Secluded Home can be found by moving North West from the intersection of 7th Street and Apple Street in Fairhaven.
This is the home of Obsidian, the Shadow Dragon NPC.
A secluded single-story home in the far northwest end of the city. The house is divided into a kitchen, bedroom, two bathrooms, and a living room, providing ample room for Obsidian to live comfortably on her lonesome. She invites you to take a seat in the living room on one of the available couches, but otherwise leaves you to your own devices, taking care of something in the bedroom.