Depending on the story, they may be hostile or friendly to humans. Mountain dwarfs live deeper underground and have fairer skin than hill dwarfs. Dwarfs are considered to be children for the first 30 years of their lives. (However, even dwarf children, of both sexes, already have beards.) For about ten years, roughly age 30-40, dwarfs go through a period of young adulthood or adolescence.
Somewhere in a deep, dark forest seven dwarfs live all by themselves. The first is working in the garden, the second is reading a book, the third is cooking, the fourth is playing chess, the fifth is hanging laundry and the sixth is cleaning house. What is the seventh doing?