The second protagonist, whose childhood story unfolds in 1927 New Jersey through illustrations, depicting her challenges as a deaf and mute child seeking family connections.

Ben's deceased mother, remembered for her independent spirit and love of learning, who influences Ben's quest for understanding his family history.

A boy who befriends Ben in New York City, assisting him with learning sign language and exploring the museum, despite having personal struggles with loneliness.

Rose’s older brother who plays a supportive role in her life by encouraging her integration into a school for deaf children and sharing a love for books.

Ben's father and Rose's son, who is connected to the American Museum of Natural History and Gunflint Lake, though his story is shaped by past events.

Ben’s cousin who sympathetically supports him during his time of grief, unknowingly facilitating his journey to New York City.

A renowned actress and Rose's mother, whose relationship with her daughter is complicated by her career aspirations and past social circumstances.

Ben’s supportive aunt who is trying to care for him after the death of his mother and provides necessary medical care following his accident.