| Chrissie | Arthur | Josie's mother. |
| Henry | Capaldi | The portrait guy. |
| Miss | Helen | Rick's mother. |
| Professor | Helm | Josie's professor. |
| Coffee Cup | Lady | One of the customers at the RPO building. |
| Cooting | Machine | The machine that blocks the sun. |
| Beggar | Man | The beggar at the RPO building. |
| Rain Coat | Man | Coffee Cup Lady's lover. |
| Mr. | McBain | Josie's neighbor. |
| AF | Rex | One of the Artificial Friends. |
| Mrs. | Rivers | Chrissie's friend. |
| Dr. | Ryan | Josie's doctor. |
| Sung | Yi | A B3-Type of Artificial Friend. |
| Benjamin | | Paul's friend. |
| Caroline | | The daughter of the Artificial Friend customer. |
| Cindy | | The waitress. |
| Danny | | The boy who was detained by the police. |
| Josie | | The 14-year old girl who chooses Klara. |
| Klara | | Protagonist. |
| Manager | | The Artificial Friend seller. |
| Melania | | Josie's housekeeper. |
| Missy | | One of Rick's neighbors. |
| Paul | | Josie's father |
| Peter | | One of Chrissie's friends. |
| Phil | | Danny's friend. |
| Rick | | Josie's best friend. |
| Rosa | | One of the Artificial Friends. Klara's companion. |
| Sal | | Josie's dead sister. |
| Sara | | One of Chrissie's friends. |
| Vance | | Helen's ex-lover. |
