| Luke | Anderson | One of Izzy's classmates. |
| Harry | Barrows | The Art Director of the State Museum. Izzy's foster father. |
| Peg | Barrows | The museum curator. Izzy's foster mother. |
| Ethan | Black | Izzy's friend and classmate. Aka: Raven Boy. |
| Peter | Black | Peg and Harry's friend. Ethan's father. |
| Ruth | Cartwi | Clara's mother. |
| Bella Clara E. | Cartwright | One of the protagonists. |
| Henry Earl | Cartwright | Clara's father. |
| William | Cartwright | Clara's older brother. Deceased. |
| Mr. | Defoe | Ethan and Izzy's teacher. |
| James | Gallagher | Clara's fiancé. |
| Richard | Gallagher | Henry's business partner. |
| Mr. | Glen | The man who took Clara to Willard Asylum. |
| Mr. | Hudson | Izzy's teacher. |
| Lawrence | Lawrence | The grave digger at Willard. |
| Shannon | MacKenzie | Ethan's girlfriend. |
| Miss | Mason | The woman from Children's Aid Society. |
| Beatrice E. | Moretti | Clara and Bruno's daughter. |
| Bruno | Moretti | Son of a shoemaker. Clara's boyfriend. Aka: Joseph Russo. |
| Dr. | Roach | The doctor at Willard Asylum. |
| Mary | Rote | The first patient of Willard Asylum. |
| Dr. | Slade | Clara's ob-gyne. |
| Isabella | Stone | Protagonist. Aka: Izzy. |
| Joyce | Stone | Izzy's mother. Deceased. |
| Dr. | Thorn | Clara's doctor. |
| Rita | Trench | One of the nurses at Willard Asylum. |
| Alexandra | | Izzy's new friend. Aka: Alex. |
| Bryan | | Ethan and Izzy's classmate. |
| Crystal | | Shannon's friend. |
| Dan | | The orderlies in charge at Willard. |
| Dave | | Shannon's friend. |
| Dave | | Ethan and Izzy's classmate. |
| Esther | | Clara's co-patient. |
| Fin | | Alex's friend. |
| Jackie | | Alex's friend. |
| Joe | | The drunkard who kissed Clara. |
| Julia | | Clara's friend. |
| Kim | | Alex's friend. |
| Lillian | | Clara's friend. |
| Lucy | | Ethan's dog. |
| Madeline | | Clara's co-patient. |
| Mary | | Clara's friend. |
| Matilda | | The old laundry woman. |
| McCarn | | Clara's nurse. |
| Paul | | Ethan and Izzy's classmate. |
| Renee | | Rita's nurse. |
| Richard | | The orderlies in charge at Willard. |
| Stanley | | Clara's co-patient. Stanford. |
| Yott | | McCarn's co-nurse. |
