Etta is Bree’s mentor and swim coach who lives in the same apartment complex; she teaches Bree about swimming and shares her own experiences from her youth.

Ralph is Bree’s single father, who moves with her to Florida for his new technology training program; he supports Bree’s education and gradually becomes more involved in her swimming activities.

Clara is Bree’s first friend in Florida and a fellow swim team member; she is determined to succeed in swimming but struggles with math, seeking help from Bree.

Phillipa is a member of Bree’s swim team known as “the Anchor”; she initially struggles with swimming and is sensitive about her performance but finds her confidence with encouragement from others.

Keisha is a new member of Bree’s swim team who previously attended Holyoke Prep; she initially has a tough exterior but gradually appreciates the supportive atmosphere at Enith Brigitha Middle School.