| Niles |
Barclay | British auctioneer |
| Coco |
Chanel | French fashion designer |
| Marie |
Charlet | Henri's first liaison |
| Dr. |
Colson | Resident doctor |
| Finn |
Colson | Diana's boyfriend |
| Dr. |
de Santos | Diana's therapist |
| Henri |
de Toulouse-Lautrec | French painter who scandalized the Impressionist art world by depicting brothel life |
| Joe |
DiMaggio | Baseball player; Marilyn Monroe's former husband |
| Mr. |
Duncan | Client of Sotheby's |
| Amelia |
Earhart | Aviation pioneer and the first female aviator to fly solo across the Atlantic Ocean |
| Beatriz |
Fernandez | Gabriel's daughter; tourist/vacationer |
| Gabriel |
Fernandez | Abuela's grandson |
| James Wall |
Finn | Celebrated American muralist |
| Janice |
Fleisch | Director of a memory care facility |
| Eric |
Genovese | Coma patient experiencing confusion |
| Elizabeth |
Gilbert | American author known for "Eat, Pray, Love" |
| Kitomi |
Ito | Diana's potential client |
| Choi |
Jeong Hwa | Korean artist known for using recycled materials |
| Rosa |
La Rouge | Nude model |
| Marilyn |
Monroe | American actress and singer |
| Diana |
O'Toole | Art specialist; protagonist |
| Hannah |
O'Toole | Diana's mother |
| Sam |
Pride | Kitomi's famous husband; murdered |
| William |
Punt | Sam's co-writer |
| Sally |
Ride | American astronaut and physicist; first American woman in space |
| Wallis |
Simpson | American divorcée associated with Edward VIII |
| Eva |
St. Clerck | Diana's boss |
| Dr. |
Sturgis | Intensivist |
| Suzanne |
Valadon | Henri's former lover and artist |
| Edward |
VIII | King of England who abdicated the throne |
| Margaret |
Wu | Doctor at Mount Sinai; Diana's father's physician |
| Abuela |
| Owner of the apartment where Diana stayed |
| Alice |
| Diana's walker (assistive device) |
| Ana Maria |
| Beatriz's host sister |
| Athena |
| ICU nurse |
| Betty |
| Night nurse |
| Chiara |
| Rodney's niece |
| Chris |
| Certified nursing assistant |
| Elena |
| Hotel employee |
| Henry |
| Michelle's wife |
| Jared |
| Diana's first crush |
| Leilah |
| Alternate-dimension wife of Eric |
| Luz |
| Beatriz's mother |
| Maggie |
| Hospital volunteer |
| Maya |
| Eric's daughter |
| Michelle |
| COVID-19 patient |
| Prisha |
| Physical therapist |
| Rayanne |
| Rodney's sister |
| Rodney |
| Diana's best friend at Sotheby's |
| Sara |
| Speech therapist |
| Syreta |
| Diana's nurse |
| Vee |
| Diana's occupational therapist |
| Verna |
| Hannah's aide |
| Zach |
| Nurse |
