The younger of the Florek brothers and Percy's love interest, a science enthusiast with aspirations to become a cardiologist, who deals with personal loss and family dynamics as he develops feelings for Percy.

Sam's older and more outgoing brother, who often flirts with Percy and plays a complex role in the sibling rivalry and their shared summertime experiences.

Percy's childhood friend from the city, known for her attractiveness and popularity, who is fiercely loyal despite past tensions and remains a supportive presence in Percy's life.

Percy's closest friend, who isn't physically present but is characterized by her understanding nature and encouragement for Percy to seek therapy while maintaining their friendship through communication.