Ellida Wangel is a character deeply connected to the sea, a passion inherited from her lighthouse keeper father. Her marriage to Dr. Edvard Wangel takes her away from the ocean to live in the mountains, where she feels a profound sense of displacement. Ellida struggles with her emotions as she remembers a sailor, known as The Stranger, who had once been her lover. When he reappears, his influence on her is undeniable, conflicting with the security she feels with her husband. Ultimately, Ellida chooses to stay with Dr. Wangel, finding strength in making this decision for herself, which she believes maintains her sanity. Despite the tragedy of losing her infant son with Edvard, Ellida's resolve to stay highlights her inner fortitude.

Dr. Edvard Wangel is Ellida's understanding and supportive husband, a physician who navigates the complexities of his wife's emotional turmoil. Acknowledging her struggles, he generously releases her from their marital vows, allowing her the freedom to choose her path. This act of compassion underscores his deep love and respect for Ellida. He has two daughters, Bolette and Hilda, from a previous marriage. The couple’s shared tragedy of losing their infant son adds depth to Edvard’s character as he balances his role as a father and husband.

The Stranger is a sailor who exerts a psychological grip on Ellida due to a past romantic involvement, which included a peculiar engagement by the sea. Having fled the area after committing a crime, he returns with the intention of reclaiming Ellida, further complicating her already tumultuous emotions. Despite his influence, Ellida eventually decides to remain with her husband, breaking free from The Stranger's hold and choosing her own future.

Bolette, Dr. Wangel’s eldest daughter from his first marriage, finds it challenging to connect with her stepmother, Ellida. She is pursued by Arnholm, her former tutor and once Ellida's suitor, who returns with the intention of marrying her. Bolette's character is shaped by her relationships with her family and her suitor.

Hilda Wangel, the younger daughter of Dr. Wangel and his late first wife, also struggles to form a relationship with her stepmother, Ellida. Along with Bolette, Hilda represents the younger generation navigating the complexities of their blended family dynamics.

Arnholm, previously both Bolette’s tutor and Ellida’s admirer, returns to the Wangel household with a renewed interest in marrying Bolette. His past affections for Ellida add layers to his character, highlighting the complex romantic histories among the characters.

Lyngstrand is an aspiring sculptor who visits the Wangel home. His tales of a sailor and his wife inadvertently stir memories in Ellida of her own past with The Stranger, contributing to her internal conflict. Lyngstrand's presence and narratives serve as catalysts for Ellida's introspective journey.

Ballested is an eccentric local painter, a minor but colorful character in the play who adds to the vibrant tapestry of the Wangel family's social circle. His presence enriches the play’s exploration of art and local culture.