| | 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. |