| Eileen | Shears | Owner of the dead dog. |
| Wellington | | Mrs. Shears's dog Poodle. Deceased. |
| Christopher | Boone | Protagonist. |
| Siobhan | | Christopher's friend. |
| Mr. | Jeavons | Christopher's teacher. |
| Mr. | Paulson | Edward's father. Deceased. |
| Edward | Paulson | Christopher's calssmate. Mr. Paulson's son. |
| Terry (1) | | Christopher's uncle. |
| Kate | | Policewoman. |
| Tony | | Kate's co-policeman. |
| Burton | | Christopher's grandmother. |
| Ed | Boone | Christopher's father. |
| Rhodri | | Christopher's father's employee. |
| Terry (2) | | Francis's older brother. |
| Francis | | Christopher's schoolmate. |
| Mrs. | Peters | Christopher's art teacher. The vicar's wife. |
| Mrs. | Hardisty | Christopher's neighbor. Has a weak blood vessel. |
| Mrs. | Forbes | Christopher's teacher. |
| Reverend | Peters | The vicar. Mrs. Peter's husband. |
| Mr. | Thompson | Mrs. Shears's neighbor. |
| Mr. | Wise | Mrs. Shears's neighbor. |
| Jason | | Christopher's classmate. |
| Mrs. | Alexander | Mrs. Shears's neighbor. |
| Roger | Shears | Mrs. Shears's former husband. |
| Mrs. | Gascoyne | Christopher's school headmistress. |
| Jean | | Christopher's ex-lover. Local handyman. |
| Elly | | Siobhan's friend. |
| Melissa | Brown | Christopher's classmate. Tore his astronaut painting. |
| Harold | Snelling | Fake photography expert. |
| Mr. | Loxely | Christopher's former teacher. |
| Mrs. | Gray | Christopher's teacher. |
| Ruth | | Christopher's mother's cousin. Christopher's aunt. |
| Joseph | Fleming | Man who eats anything. |
| Tyrone | | Christopher's acquaintance. |
| Mr. | Land | Man who works on the kitchen floor. |
| Angie | | Secretary.Christopher's mother's co-worker. |
| Mr. | Perkin | Mr. Rashid's co-owner. aka: Pervy Perkin. |
| Mr. | Rashid | Owner of the company where Christopher's mother works. |
| Julie | | Christopher's adviser. |
| Nigel | | Policeman who accompanied Christopher at the train. |
| Rob | | Nigel's co-policeman. |
| Judy | Boone | Christopher's mother. |
| Sandy | | Christopher's dog. |