| Paige |
Adams | 80s teacher. |
| Casey |
Anderson | Red-haired counselor. |
| Eleanor |
Auburn | The woman in the picture. |
| Miss |
Baxter | Emma's gym teacher. |
| Mr. |
Christie | Art collector. |
| Maggie |
Collins | Camper during Emma's time at camp. |
| Nolan |
Cunningham | The boy Emma flirted with. |
| Charles |
Cutler | Asylum's doctor. |
| Emma |
Davis | Protagonist; an artist. |
| Anya |
Flaxen | Patient at Peaceful Valley. |
| Nathan |
Flynn | Detective in charge of the girls' disappearance. |
| Lena |
Gallagher | Camper during Emma's time at camp. |
| Henrietta |
Golden | Patient at Peaceful Valley. |
| Erica |
Hammond | Camper during Emma's time at camp. |
| Buchanan |
Harris | Franny's grandfather; lumber baron. |
| Theodore |
Harris | Franny's father; real estate mogul. |
| Chester |
Harris-White | Franny's son. Aka: Chet. |
| Francesca |
Harris-White | Camp's director. Aka: Franny. |
| Theodore |
Harris-White | Franny's son. |
| Vivian |
Hawthorne | One of the girls at Emma's painting. |
| Edward |
Hopper | Painter. |
| Jasper |
John | Artist. |
| Hope |
Levin Smith | Camper during Emma's time at camp. |
| Piet |
Mondrian | Artist. |
| Helmut |
Schmidt | Anya's brother. |
| Rebecca |
Schoenfeld | Notable photojournalist. |
| Ben |
Schumacher | Camp's groundskeeper. |
| John |
Singer-Sargent | Buchanan's painter. |
| Marc |
Stewart | Emma's best friend and ex-husband. |
| Lucille |
Tawny | Patient at Peaceful Valley. |
| Brooke |
Tiffany Sample | Camper during Emma's time at camp. |
| Andy |
Warhol | Artist. |
| Felecia |
Wellington | Camper during Emma's time at camp. |
| Amanda |
West | Author of Dark Ages. |
| Douglas |
White | Franny's husband. |
| Roberta |
Wright-Smith | Creative writing instructor. |
| Allison |
| One of the girls at Emma's painting. |
| Billy |
| Marc's librarian ex-boyfriend. |
| Brittney |
| Vivian's friend. |
| Diana |
| Friendly librarian. |
| Heather |
| Emma's childhood friend. |
| Julie |
| Emma's aunt. |
| Katherine |
| Vivian's sister. |
| Kelly |
| Vivian's friend. |
| Krystal |
| Child Emma supervised. |
| Lottie |
| Emma's acquaintance from the camp. |
| Marissa |
| Emma's childhood friend. |
| Marvin |
| Kitchen worker. |
| Mindy |
| Chet's fiancée. |
| Miranda |
| Child Emma supervised. |
| Natalie |
| One of the girls at Emma's painting. |
| Patricia |
| Vivian's friend. |
| Randall |
| Emma's agent. |
| Sasha |
| Child Emma supervised. |
