As the novel’s protagonist and narrator, Karana drives the plot forward and guides the reader’s experience of the story. This round, dynamic character possesses many commendable traits—including courage, compassion, responsibility, and resourcefulness. She bravely leaps into the sea and swims back to the Island of the Blue Dolphins rather than leave her younger brother Ramo alone, despite the fact she has no way of knowing when the ship will return to rescue them. This decision cements the novel as an adventure story and a tale of survival. Instead of succumbing to grief and loneliness after Ramo’s death, Karana carves out a new life for herself on the island.

Although the story is told from Karana’s perspective, she rarely shows her emotions. Instead, she allows her actions to speak for themselves. For example, her decision to spare Rontu demonstrates her capacity for forgiveness, her nurturing side, and her need for friendship. While Karana mentions her feelings sparingly, she provides abundant descriptions of the natural wonders that surround her. Her courageous, kind deeds (often involving animals) and vivid narration immerse the reader in her life on the island.

Over the course of the novel, Karana grows from a 12-year-old girl struggling to survive into a wise woman.