In the 'Vikings' series, Astrid is introduced as a significant character who plays a pivotal role in the narrative, particularly in relation to Lagertha. Initially, she serves as a shieldmaiden and a loyal companion to Lagertha, embodying the fierce spirit and independence characteristic of Viking warriors. Over time, Astrid's relationship with Lagertha evolves into a deep bond, marked by loyalty, love, and shared experiences in battle. Her character adds layers to the exploration of female agency and empowerment within the Viking context, as she navigates the challenges of loyalty, ambition, and personal identity. Astrid’s journey throughout the series showcases her growth as a warrior and leader, making her a memorable figure in the overarching saga of the Vikings.