Where he is seen at all he is seen as a black cat, and the fire pit under the drying floor is his part of the building. The barn burns or it does not, and that is read as his answer.
Basis: Russian accounts of the drying-barn spirit · AI-generated
About the Ovinnik
The spirit of the grain-drying barn: the one farm building with a fire burning under the floor, and therefore the one spirit that kills.
Linda J. Ivanits, Russian Folk Belief (1989)The standard English-language survey of the Russian village spirits and their buildings, including the drying barn and its dangers.
Marina N. Vlasova, Novaya abevega russkikh sueveriy (A New Alphabet of Russian Superstitions) (1995)Russian dictionary of folk belief; regional variation in the barn spirit's appearance and in the rules for working at night.