The Paris Casterwill house was the former house of Sophie Casterwill, Lucas Casterwill, and Santiago.
History[]
When Lucas and Sophie Casterwill were children, Kiel of the Blood Spiral Brotherhood set the house on fire and destroyed it. The siblings believe their parents to have perished in the blaze. Lucas managed to make it out, though not with Sophie and Santiago, who had believed Lucas to be dead. S2E31