| | | | 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. |
