fylgnin
Fylgnin is a term with roots in Old Norse mythology, referring to a guardian spirit or familiar that is believed to be closely linked to an individual. These spirits were thought to be embodiments of a person's fate or destiny, and their well-being was often considered to be intertwined with that of their human counterpart. The concept of fylgnin is not a single, unified doctrine but rather a collection of beliefs and interpretations that varied across different Norse cultural groups and time periods.
It was often depicted as a female figure, sometimes resembling an animal, who would follow her charge.