Halla

Halla ("frost") was the personification of nightly frost, whose arrival indicated the end of growing season and the beginning of winter. It walked on lowlands, fields and swamps freezing the earth and turning the air cold. It wasn't dangerous to humans; it didn't walk on yards and soon returned back to alinen where it rose from.

Halla looked like a ghost: translucent and grey, shaped like the nighttime mist.

The name "halla" literally means "frost". It originates from Proto-Finnic *halla, from earlier *šalna, from a Baltic language.