Bill is the 60-year-old owner of The Nantucket Beach Club and Hotel, who inherited it from his father. He plans to pass the property to his daughter, Cecily, due to his heart problems.

Therese is Bill's wife, who values beauty and order, and is more emotionally engaged with the hotel guests than Bill. She handles the emotional needs of her family and guests.

Maribel is a librarian in her mid-twenties and Mack's romantic partner of six years. She seeks stability and marriage, influenced by her upbringing as the daughter of a single mother.

Jem is a 23-year-old college graduate working at the hotel, aspiring to become an actor's agent in California. He develops feelings for Maribel and undergoes personal growth through a friendship with a hotel guest.

Vance, a 30-year-old head bellman at the hotel, initially harbors resentment towards Mack. He is a caring colleague and partner, with a diverse set of interests and talents.

Love is a 40-year-old woman who moves to Nantucket hoping to find a partner to father her child. She is athletic and becomes involved with Vance, seeking both motherhood and a relationship.

Cecily is Bill's 18-year-old daughter, who resists inheriting the family hotel business. She has plans to travel to Brazil, indicating her desire for independence.

Lacey, at 88, is a long-time resident and supporter of the Beach Club. She plays a maternal role to Mack, offering wisdom and leaving him her cottage in her will.

Neil is a hotel guest who, while battling cancer, befriends Jem and offers him guidance and financial support. He has a significant impact on Jem's personal development.