An 18-year-old hockey player from Massachusetts grappling with anger and grief over personal loss, who also participates in the therapy trip to better understand and manage his emotions.

A teen on the grief trip who struggles with unexpressed love after losing his boyfriend in an accident, providing support and friendship to others on the journey.

A participant in the grief trip who has lost both her parents, contributing to the exploration of diverse forms of grief experienced by the teens.

Another teen on the grief trip who has experienced the loss of her mother and brother, offering another perspective on the impact of losing loved ones.

A contemporary American teen on the trip who deals with the trauma of losing friends in a school shooting, reflecting real-world issues faced by the novel's target audience.

Savannah’s late sister, previously a central character, who continues to influence the narrative through her journal entries, providing insight into her personality and Savannah's path to healing.

Cael’s deceased brother, remembered through Cael’s memories, and whose death profoundly impacts Cael’s journey through grief.

Savannah’s supportive surviving sister, who remains a source of strength and companionship for Savannah during her personal journey.

The therapists leading the grief trip, guiding Savannah, Cael, and the other teens through their emotional experiences, with Leo sharing a personal connection to the themes of the story.