| 1 | Bixby Alexander | Tam | Protagonist. Aka: Bat. |
| | Janie | Tam | Bixby's sister. |
| 2 | Mr. | Grayson | Bat's teacher. |
| 6 | Ezra | | Janie's best friend. |
| 7 | Laurence | | Bat's favorite vet tech. |
| | Robert | Willett | The school owner. |
| 8 | Mrs. | Martinez | One of Bat's teachers. |
| | Lucca | | One of Bat's classmates. |
| | Israel | | One of Bat's classmates. |
| | Miss | Kiko | The kindergarten teacher. |
| 9 | Babycakes | | The rabbit at Bat's school. |
| | Jenny | Pearson | One of Babycakes's frequent visitors. |
| | Cory | | One of Bat's classmates. |
| | Raymond | | One of Bat's classmates. |
| 10 | Julio | | A 4th grader. |
| | Mr. | Martinez | The school principal. |
| | Alexander | Tam | Bat's father. |
| 12 | Beary | | Bat's teddy bear. |
| | Patches | | Bat's cat. |
| | Thor | | Bat's skunk. |
| | Jerry | Draggo | The world's skunk expert. |
| | Valerie | Tam | Bat's mother. A veterinarian. |
| | Pickles | | The sick cat. |
| | Jeff | | The poodle at the vet. |
| 26 | Tom | | Israel's father. |
