| Elizabeth |
Campbell | Sierra's close friend |
| Mr. |
Cappeau | French teacher |
| Mr. |
Hopper | Sierra's old acquaintance in California |
| Miss |
Livingston | School theater director |
| Cassandra |
Moore | Jeremiah Moore's sister |
| Jeremiah |
Moore | Band member; Caleb's ex-best friend |
| Mrs. |
Moore | Jeremiah Moore's mother |
| Mr. |
Ramsay | Customer of Sierra's parents |
| Mrs. |
Ramsay | Mr. Ramsay's wife |
| Mr. |
Richardson | Mrs. Richardson's father |
| Mrs. |
Richardson | Sierra's old acquaintance in California |
| Luis |
Trujillo | Mrs. Trujillo's son; Caleb's friend |
| Mrs. |
Trujillo | Person from whom Caleb bought a tree |
| Christy |
Wang | The girl who dislikes Sierra |
| Abby |
| Caleb's sister |
| Alyssa |
| The girl who was seeing Andrew |
| Andrew |
| The boy Sierra asked out |
| Brent |
| One of Caleb's acquaintances |
| Bruce |
| Sierra's uncle |
| Caleb |
| The boy Sierra likes |
| Devon |
| Heather's boyfriend |
| Heather |
| Sierra's best friend in California |
| Mason |
| The guy Sierra dumped |
| Penny |
| Bruce's wife; Sierra's aunt |
| Rachel |
| Sierra's best friend |
| Sierra |
| Protagonist |
