(...) Some fairy lore makes a clear division between good and wicked types of fairies — between those who are friendly to mankind, and those who seek to cause us harm. In Scottish tales, good fairies make up the Seelie Court, which means the Blessed Court, while bad fairies congregate in the Unseelie Court, ruled by the dark queen Nicnivin. In old Norse myth, the Liosálfar (Light Elves) are regal, compassionate creatures who live in the sky in the realm of Alfheim, while the Döckálfar (the Dark Elves) live underground and are greatly feared. Yet in other traditions, a fairy can be good or bad, depending on the circumstance or on the fairy's whim. They are often portrayed as amoral beings, rather than as immoral ones, who simply have little comprehension of human notions of right and wrong.
The great English folklorist Katherine Briggs tended to avoid the "good" and "bad" division, preferring the categorizations of Solitary and Trooping Fairies instead. (...)
— Terri Windling
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