* Lindsay "Lin" Harris: The protagonist of the story, a high school senior struggling with the pressures of social expectations, popularity, and her complicated relationship with her family and friends.
* David "Dave" Evans: Lin's boyfriend, a kind and sensitive young man who loves her deeply but sometimes struggles to understand her emotional complexities.
* Megan: Lin's best friend, who is initially supportive but later becomes more self-absorbed and focused on her own popularity, causing friction in their friendship.
* Kelly: Lin's other close friend, who is a strong and independent young woman with her own issues. She becomes a source of comfort and support for Lin.
* Mr. and Mrs. Harris: Lin's parents, who have a strained relationship and often struggle to communicate effectively with Lin.
These are the main characters who drive the plot and explore the themes of friendship, family, identity, and self-discovery in the context of a high school prom.