Oberon's Children - Weird Sisters

Alone among Oberon's children, the triplet sorceresses called the Weird Sisters were the only ones of the third race left at Avalon following Oberon's banishment as sentries and to care for the island. They failed at this task when the Magus from Castle Wyvern used his magic to get past them, and ever since have held a grudge not only against the Magus but against the whole of the Avalon Clan (and, by extension, Goliath's clan also).

In order to get their revenge while circumventing Oberon's rules preventing interference in mortal affairs, they bound themselves in servitude to the Archmage (who was traveling through time in his own plot to take revenge on Goliath). The Weird Sisters, on the Archmage's word, performed the spell that bound Demona to Macbeth, making both immortal and invulnerable, and then enslaved them to the Archmage. When they were defeated, the ever vengeful sisters returned to Avalon with Oberon hoping to get one final score.

Like Oberon, their true motives are inscrutable and their behavior amoral. While they unquestionably follow Oberon's will and do his bidding such as bringing back the defiant Banshee and guarding Avalon, they have done actions that often circumvent his will such as assisting the Archmage. While they initially helped the Gargoyles in their first appearance on the show (in the episode City of Stone), they have since often gone into conflict with Goliath and particularly the Avalon Clan making them villains. Creator Greg Weisman has stated that each of the three has a distinct personality. The dark-haired one, Selene, represents fury; the gold-haired one, Phoebe, represents grace; the silver-haired one, Luna, represents fate. Their actions, while sometimes appearing contradictory, work towards achieving all three aims simultaneously. As such, they can appear variously as Fates (or Norns), Graces or Furies, depending upon which one of them is "ascendant". Note that they are all named after moon goddesses, though no connection to the moon has ever been made clear on the series.

The three sisters take many forms, most commonly young women, but have also appeared to Goliath as children. To Macbeth, they appeared as old women (the three witches who prophesied that Macbeth would be King of Scotland); to Duncan, the second Hunter, as maids; to Coldstone in cyberspace they appeared as three versions of his mate Desdemona; to Demona they appeared as wizened old gargoyles. Interestingly, when Demona and Macbeth both saw the Sisters at the same time, they seemed to have each seen a different vision of their appearance, implying they may deal more in illusions than transformation. Notably, the sisters' respective hair colors remain the same no matter how they look.

All three Weird Sisters were voiced by Kath Soucie.

• A planned but unmade 2 Part story has The Weird Sisters imprisoning the cast into the Shakespeare play Macbeth. The higher ups insisted on the story being a single episode, due to its weirdness. Since it wouldn't work as such, it remained unmade.