Thornboldt Durst

6 years old
If either the dollhouse or the chest is disturbed, the ghosts of Rose and Thorn appear in the middle of the room. Use the ghost statistics in the Monster Manual, with the following modifications: The ghosts are Small and lawful good. They have 35 (10d6) hit points each. They lack the Horrifying Visage action. They speak Common and have a challenge rating of 3 (700 XP).
The children don't like it when the characters disturb their toys, but they fight only in self-defense. Unlike the illusions outside the house, these children know that they're dead. If asked how they died, Rose and Thorn explain that their parents locked them in the attic to protect them from "the monster in the basement," and that they died from hunger. If asked how one gets to the basement, Rose points to the doll house and says, "There's a secret door in the attic." Characters who then search the dollhouse for secret doors gain advantage on their Wisdom (Perception) checks to find them.
The children fear abandonment. If one or more characters try to leave, the ghost-children attempt to possess them. A character possessed by the ghost of Rose or Thorn won't willingly leave Death House or the dungeon below it. Both ghosts can be intimidated into leaving their hosts with a successful DC 11 Charisma ( Intimidation) check made as an action. A ghost reduced to O hit points can reform at dawn the next day. The only way to put the children's spirits to rest is to put their skeletal remains in their tombs (areas 23E and 23F). The children don't know this, however.