| 2 | Isabella | B. Thornton | Protagonist and Narrator. Aka: Izzy. |
| 4 | Anastasia | C. McAdoo | Isaiah's girlfriend. |
| | John Mark | Metzker | Nicole's boyfriend. Aka: Number Seven. |
| 7 | Alicia | | Isaiah's friend. |
| | Monique | | Isaiah's friend. |
| | Miss | Pearson | Izzy's acquaintance at the homeless shelter. |
| 8 | Heather | | Izzy's friend and classmate. |
| | Imani | Bonner | Izzy's friend and classmate. |
| | Mr. | Kazilly | Izzy's English and History teacher. Aka: Mr. K. |
| | Clint | Hammond | Izzy's handsome classmate. |
| | Logan | Lindquist | Izzy's schoolmate. Logan's friend. |
| | Toby | Smythe | Clint and Logan's friend. |
| 11 | Isaiah Maxwell | Thornton III | Izzy's father. |
| 12 | Zeke | | The assistant manager at Scatterpin Bowl. |
| 14 | Madame | Rubenstein | Izzy's piano teacher. |
| 15 | Fifi | | Anastasia's dog. |
| 18 | Remi | Geniet | A guest piano soloist at Cincinnati Symphony Orchestra. |
| | Nicole Theresa | Thornton | Izzy's mother. |
| 20 | Gretchen | | Izzy's classmate. |
| | Jontay | | Izzy's classmate. |
| | Cecil | | Izzy's classmate. |
| 25 | Manuel | | Izzy's classmate. |
| | Rochelle | | Izzy's classmate. |
| | Tiffany | | Izzy's white classmate. |
| | Kevin | | Izzy's classmate. |
| 28 | Erin | | Rochelle's friend. |
| | Langston | Hughes | A poet. |
| | Gwendolyn | Brooks | A famous poet. |
| | Maya | Angelou | A famous poet. |
| | Jason | Reynolds | A famous poet. |
| | Paul Laurence | Dunbar | A poet who lived in Dayton. |
| 29 | Muzio | Clementi | An Italian composer. |
| 30 | Mrs. | Garcia | The sixth-grade counselor. The principal at Izzy's school. |
| 31 | Mrs. | Bonner | Imani's mother. |
| 35 | Joyce | Kilmer | An American author. |
| 40 | Griselda | | A saleslady at the mall store. |
| | Kendi | | Imani's sister. |
| 41 | Herbert | | A salesman at party city. |
| 50 | Cornelius | | A waiter. |
| 56 | Chango | | Isaiah's best friend. |
| 60 | Alessandro | Deljavan | An Italian classical pianist. |
| 63 | Mrs. | Hammond | Clint's mother. |
| 70 | Naomi | | Izzy's nurse. |
