A man known for capturing a Pulitzer prize award winning photograph of a dying girl in Sudan. He is in a relationship with children. He's the main person recording "The Navidson Record", which consists of a house where there's a seemingly endless hallway that should not exist. He is the Protagonist for "The Navidson Record", and is seen as holding a voracious curiosity that can not be satisfied until he gets to the bottom of the hallway. His name is often shortened to just "Navidson" instead of "Will".

Navidson's partner, who is significantly more cautious. She is stressed about the hallway in her house and the way it is tearing her family apart. She also picks up an interest in Feng Shui as a coping skill.

Navidson and Karen's Daughter, around 5 years old. Carefree.

Navidson and Karen's Son, 8 years old, more cautious and serious than Daisy.

Will Navidson's Fraternal Twin Brother, referred to as Tom unlike Will, who is referred to as Navidson. He and Navidson have not talked in years by the time Navidson reaches out, but they grow close again.

An old friend of Navidson, who he met upon getting photographed by him, the photograph portraying how he lost his legs. He used to hate the photo until it ended up being a handy way of succinctly explaining how he lost them, and explaining why he's in a wheelchair. He teaches engineering.

Unknown relation to Navidson or Karen, is from Menomonie, Wisconsin, and got his bachelors from U. Mass. He is a bearded, broad shouldered man. He is seemingly lost in the hallway during "Exploration #4".