Louise's twin sister, who is perceived as dainty and talented, particularly in music. She is the focus of much of the family's attention due to her singing abilities.

Louise and Caroline's parents, with Truitt working as a crab fisherman and Susan arriving on Rass Island with dreams of teaching. They are seen as giving more attention to Caroline's musical talents.

Truitt’s mother, noted for her devout Methodist beliefs and harsh remarks. She is one of the few characters aware of Louise’s deeper feelings, despite her often critical nature.

Louise’s only friend, noted for his pragmatism and mature before his time due to family responsibilities. He contributes significantly to the community and later enlists in the Navy during WWII.

An elderly man who returns to Rass Island and befriends Louise and Call. Known for his wisdom and willingness to encourage others to take ownership of their lives.

An eccentric island resident who lives with many stray cats and strikes friendships with the Captain and Caroline. She enjoys music and has a mysterious financial background.