- Alex: The protagonist of the novel. He is a 17-year-old boy who is struggling with the loss of his best friend, who died in a car accident.
- Sam: Alex's best friend. He is killed in a car accident at the beginning of the novel.
- Emma: Alex's girlfriend. She is supportive of Alex as he grieves Sam's death.
- Alex's parents: Alex's parents are supportive of him as he grieves Sam's death. However, they are also struggling with their grief and sometimes have difficulty understanding what Alex is going through.
- Sam's parents: Sam's parents are also grieving the loss of their son. They are angry and bitter about Sam's death, and they blame Alex for it.
- The school counselor: Alex's school counselor helps him to cope with his grief and provides support for him as he struggles with his emotions.