| Mrs. |
Asbury | The school principal. |
| Judy |
Blume | An American writer. |
| Shirley |
Chisholm | First black woman elected to Congress. |
| Grace Alice |
Cho | An entrepreneur. Olive's classmate and best friend. |
| Emily |
Dickinson | The poet. |
| Mrs. |
Faye | Olive's neighbor. |
| Mrs. |
Fitch | The ghost of the library. |
| Luther |
Frye | The man who lived in the oldest house on Main Street. |
| Marvin |
Frye | One of the students who found the legendary Wildwood hummingbird. Luther's brother. |
| Merlin |
Goad | Olive's grandfather. Most famous birder in the state of Tennessee. |
| Bon |
Jovi | The Sloth. |
| Dr. |
Kass | Olive's surgeon. |
| First |
Maddie | The class skeptic and class celebrity. |
| Second |
Maddie | One of Olive's classmates. |
| Third |
Maddie | One of Olive's classmates. |
| Coach |
Malone | Hatch's father. Olive's step-father. |
| Hatch |
Malone | Olive's stepbrother. |
| Jessie |
Marcum | Melba's twin sister. |
| Melba |
Marcum | Second oldest person in Wildwood. |
| Jupiter |
Martin | Olive's father. |
| Olive Miracle |
Martin | Narrator and Protagonist. |
| Mayor |
Matheson | The current Mayor. |
| Mrs. |
Matheson | A theatre teacher. |
| Ransom |
McCallister | Olive's crush. |
| Beef |
McGoo | The lead DJ. |
| Twig |
Moody | The mystery girl. |
| Dolly |
Parton | American singer. Olive's idol. |
| Ms. |
Pigeon | Olive's aide. AKA: Barb. |
| Rosie |
Snow | The librarian. |
| Nester |
Tuberose | Owner of Ragged Apple Café. |
| John |
Watson | A 6th grade teacher. |
| Amy |
Webber | One of the 6th graders. |
| Biscuit |
| The Dog at Hatch's own story. |
| Chris |
| Olive's nurse. |
| Dash |
| Olive's uncle. |
| Dolly |
| Olive's wheelchair. |
| Dylan |
| The interviewer. |
| Edna |
| The golden llama. |
| Elizabeth |
| Olive's grandmother. |
| Felix |
| A pelican who sometimes lives under Olive's roof. |
| Gustav |
| Luther's pet ferret. |
| Mistry |
| Olive's mother. |
| Mitrac |
| The pastor. |
| Reba |
| Olive's wheelchair. |
| Thomas |
| One of Olive's schoolmates. |