| Phil |
Crain | Alcoholic gambler who pretended to be Geoffrey Rosenberg. |
| Mariah |
Dove | Girlfriend of Phil Crain while he poses as Rosenberg. |
| Lesley |
Dupin | Detective investigating Cara's case and suspects deliberate poisoning. |
| Eric |
Fisher | Nick's real identity, revealed later in the story. |
| Young |
Girl | A young girl who was drugged during a party. |
| Julien |
Lenz | Manager of Rosenberg's house who oversees staff and security. Aka: Mr. Warden |
| Bernie |
Madoff | Real-life financier referenced for comparison to major financial fraud. |
| Natalie |
Olsen | Protagonist; a woman drawn into a dangerous mystery following her friend's poisoning. |
| Geoffrey |
Rosenberg | Wealthy cryptocurrency exchange owner and the "Man of the Year" featured on a magazine cover. |
| Anonymous |
| Unnamed narrator whose identity suggests a possible killer. |
| Cara |
| Natalie's best friend who is poisoned with drugs. |
| Darla |
| Former housekeeper at Rosenberg's estate. |
| Dave |
| One of Geoffrey Rosenberg's guards. |
| Dave |
| Member of the catering crew at the event. |
| Emily |
| Julien Lenz's sister; revealed to be Detective Dupin's real identity. |
| Jenny |
| One of Cara's friends. |
| Lilly |
| Natalie's neighbor; works as a nurse. |
| Lindsey |
| One of Natalie's close friends. |
| Nick |
| Handsome man Natalie meets; Geoffrey Rosenberg's personal driver. |
| Pat |
| One of Cara's friends. |
| Rich |
| Man who blackmails Geoffrey Rosenberg. Aka: Stalker Guy |
| Rita |
| Woman who invested money in Nick's business venture. |
| Rosalie |
| Current housekeeper at Rosenberg's estate. |
| Sagar |
| Member of the catering crew at the event. |
| Steve |
| One of Rosenberg's security guards. |
| Steve |
| Member of the catering crew at the event. |
| Trixy |
| Natalie's pet rat. |
| Walter |
| The gardener at Rosenberg's property. |
| Will |
| Emily's fiancé. |
