An anthropologist with a keen interest in supernatural phenomena who organizes a summer study at Hill House. He is portrayed as a diligent and careful researcher.

An artist invited to Hill House due to her psychic abilities. She is confident, bold, and often oscillates between being supportive and sarcastic towards Eleanor.

A future heir to Hill House, invited by Dr. Montague as a family representative. He uses humor to cope with the house's atmosphere and is characterized by a combination of charm and cowardice.

The caretaker at Hill House who maintains a strict routine and insists on not being present after dark, providing comic relief with her rigid demeanor.

Dr. Montague's wife, who arrives later to conduct her own research with superstitious methods. She is portrayed as critical and completely oblivious to the actual supernatural events in the house.