So historically the "Fae" were fairies but were more like gods and servants to the Kelts

https://trefoil.fandom.com/wiki/The_Seelie_Court

On one side was the dark, Unseelie Court led by the Morrigan. On the other light side Queen Tatiana the lady if light.

The Fae courts were forces of nature and both sides were light and dark but not necessarily good or evil. Even the lifegiving sun can kill you.