They are greatly affected, as are all nature spirits, by human humankind's thinking. The sylphs are the air spirits. They live hundreds of years, often reaching one thousand and never seeming to get old. They are said to live on the tops of mountains. The leader of the sylphs is a being called Paralda who is said to dwell on the highest mountain of Earth.
Sylphs often assume human form but only for short periods of time.
The vary in size from being as large as a human to being much smaller. They are volatile and changeable. The winds are their particular vehicle. The work through the gases and ethers of the Earth and are kindly toward humans. They are usually seen with wings, looking like cherubs or fairies.