The sea is a recurring motif that represents Grace’s essential identity, a domain of freedom and power in stark contrast to the confining, patriarchal world on land. For the O’Malley clan, maritime strength is the foundation of their influence, but for Grace, the connection is almost spiritual. From childhood, she’s drawn to it, telling her mother, “I don’t want to stay. I want to go” (6). This desire is for a world where she can define her own role. Maeve recognizes this innate bond, prophesying that Grace’s gray eyes are a sign that “the sea belongs to her” (13). This prophecy proves true as Grace becomes a formidable sea captain, communicating with the sea god Manannán and commanding a fleet that rivals the English. The sea becomes the arena where she proves her capabilities, subverts gender expectations, and exercises a sovereignty impossible within the stone walls of a castle. It is her refuge and her kingdom, the source of both her wealth and her legend, making her mastery of it a powerful act of defiance against the forces of both patriarchy and imperialism.