| | | Part I |
1 | Claire | | Narrator. Protagonist. |
| Mrs. | Shields | School secretary. |
| Mrs. | Otis | School teacher. |
| Sammy | | Claire's brother. |
| Katie | Johnson | Claire's classmate. |
| Teresa | | Claire's classmate. |
| Jill | Breslin | Senior from English Class. |
| Abby | Winter | Claire's classmate. |
| Randy | | Claire's friend. |
| Mr. | Baker | School teacher. |
| Marisol | | Claire's schoolmate. |
| Mrs. | Lawson | Sammy's teacher. |
| Spencer | | Sammy's best friend. |
| Lizzie | | Claire's acquaintance. |
| Ted | | Claire's mother's friend. |
| Lia | | Claire's mother's friend. |
| Rana | | Ted and Lia's daughter. Claire's friend. |
2 | Jasper | | Narrator. Gay. |
| | | Park Slope - Peter's home. |
| Peter | Jennings | Jasper's crush. |
| Amanda | | Jasper's schoolmate. Also lives in Park Slope. |
| Simon | | Jasper's ex-lover. |
3 | Peter | | Narrator. Jasper's love interest. |
| | | Part II |
4 | John | | Peter's best friend. |
| Nicole | | Peter's friend. |
| Mitchell | | Claire, Jasper, and
Peter's friend who has a party. |
| Veronica | | John's girlfriend. |
5 | Sally | Bowles | Jasper's friend. |
| | | Part III |
7 | | | Travis - The band that saved Peter's life. |
| Carly | Fisher | The girl Peter's annoyed with. |
| Aiden | Smith | Peter's first kiss. Claire's schoolmate. |
9 | Bill | | Mitchell's brother. |
| Casey | | Claire's friend. Has a crush on Bill. |
| Laine | Taylor | Claire's schoolmate. |
| Greg | Watson | Claire's schoolmate. |
| Eric | McGutcheon | Guy at Mitchell's party. |