Fylgjur

In Nordic folklore and mythology, a fylgja (Old Norse: [ˈfylɡjɑ], Old Swedish: fylghia, older Dalecarlian: fylgja) is a supernatural being or spirit which accompanies a person in connection to their fate or fortune. They can appear to people in their sleep as dream-women, or appear to them while awake, often in the disembodied spiritual form of an enemy.