Ernestina is a fictional character from the novel "The Old Man and the Sea" by Ernest Hemingway. She is often associated with the protagonist, an old fisherman named Santiago, who reflects on his life and struggles at sea. Although not physically present in the story, her influence is felt through Santiago's memories and dreams. In the narrative, Ernestina symbolizes hope and the enduring spirit of love. Her character represents the emotional connections that sustain individuals through hardships. The relationship between Santiago and Ernestina highlights themes of longing and the importance of companionship in the face of adversity.