The enigmatic owner of a 24-hour bookstore who stands between a love for old books and an interest in new technology. He acts as a mentor figure, encouraging the younger generation's participation in solving long-standing mysteries.

Clay's love interest and a technologically adept character who provides access to extensive resources. Her keen intelligence and views on technological progress play a critical role in the narrative.

The head of a secretive organization opposed to technological change and serves as a formidable obstacle to Clay. His focus on tradition and control defines his role in the story's tension.

Clay's roommate, a special effects artist who values manual techniques over digital ones in his work. His craft underscores the continued relevance and beauty of older technological processes.

A former night clerk at the bookstore who aids in the progress of incorporating technology into traditional pursuits. His dual interest in innovation and living in the present gives depth to his character.