The Slavic household spirit believed to live in the barn and affect farmers is the Ovinnik.
More precisely, the ovinnik is associated with the threshing house, a farm building where grain was processed and stored. Its name comes from the Slavic word ovin, meaning a barn or drying house. Because fire could destroy a harvest, this spirit was often portrayed as dangerous, especially when angered or neglected.
Folklore says an ovinnik might set fire to grain or a threshing building, but people could placate it with offerings. Roosters and bliny are among the foods recorded in accounts of these rites. The spirit’s behavior therefore reflected the precariousness of traditional farming: it could threaten the household yet also be treated as a supernatural guardian of its agricultural wealth.
The ovinnik is easy to confuse with the domovoi, the broader household spirit, or the bannik, associated with the bathhouse. The polevik belongs to the fields rather than the barn. These spirits overlap in function, but their locations distinguish them in Slavic folklore.