Fay or Faery are sometimes divided into two classes which includes the trooping or solitary fairies. Solitary generally being the less friendly of the two. It is a distinction that hold good throughout the British Isles, and is indeed valid wherever fairy beliefs are held. The trooping fay can be large or small, friendly or sinister. They tend to wear green jackets, while the Solitary Faery wear red jackets. They can range from the Heroic Faery to the dangerrous and malevolent Sluagh, or to Diminutive Fairies who include the tiny nature spirits that make the fairy rings with their dancing and speed the growth of flowers.
Trooping Faeries: A. They can be large or small, friendly or sinister. They
tend to wear green jackets and love hunting and riding. The smaller ones
make faery rings with their circular dances.