* Alfie: A young boy who loves to collect pennies and dreams of having a hundred-penny box.
* Mama: Alfie's loving and supportive mother.
* Papa: Alfie's father who is a bit distant and preoccupied with work.
* Miss Bixby: Alfie's teacher who encourages his love of learning and inspires him with stories.
* The kids at school: Alfie's friends and classmates, including a girl named Maya who becomes his close friend.
While the book focuses on Alfie's journey, the other characters play important roles in his growth and development. They help him learn about perseverance, friendship, and the value of family.