The Norse guardian spirit that follows or accompanies a person is called a fylgja.
In Old Norse tradition, a fylgja is a supernatural companion connected with an individual’s fate, fortune, or character. The word is related to a verb meaning “to accompany” or “to follow.” A fylgja might appear in dreams, as a woman or as an animal, and its appearance could signal a person’s nature or foreshadow an important event.
Animal forms vary in the sagas and later interpretations. A fox might suggest deceit, while a powerful leader could be represented by an ox, boar, bear, eagle, or other imposing creature. Some traditions also describe family or clan spirits, called ættarfylgjur. The female form can overlap conceptually with the dísir, another group of fate-associated female beings.
A common mistake is to treat a fylgja as a simple protective angel. It can be ominous, independent in appearance, and associated with impending death. Although its name suggests that it follows its human counterpart, descriptions sometimes place it ahead of the person, appearing as a warning or portent before an encounter or turning point.