Fates

The Fates (or the Moirai) are three sisters, who are Pagan godesses of Fate.

Biography
Apparantly, God gave them the job to maintain fate, make sure everything happened the way it should, everything followed its destiny and everything died when its time was up. However, following the exploits of Sam and Dean, along with Bobby and Castiel, they were able to stop The Apocalypse occuring, thus breaking Destiny, and putting the three of them out of the job.

Balthazar saving the Titanic, angered Atropos too much, and she took matters into her own hands, killing all the descendants of the people who should have died. She then tried to kill Sam and Dean, as it was them who put her out of her job. She managed to force Balthazar and Castiel to change it back by threatening to kill Sam and Dean. She also ignored Castiel's threats because killing her would anger her sisters, and with Heavens civil war, Castiel was to busy to look after them.

Members

 * Atropos
 * Unidentified sister
 * Unidentified sister

Trivia

 * Atropos, one of the Fates, is to date the only pagan deity and none angel to go to Heaven and return at will. Minus the souls of resurrected humans.
 * In interview with Misha Collins after the airing of My Heart Will Go On, he talks about Mythology. Atropos's nameless sisters are said to be named Lachesis and Clotho.
 * Atropos said her sisters are stronger than her.
 * Despite being gods, angels such as Cas may be stronger than Atropos. Although, angels require a certain weapon to kill Fate (this suggests Cas isn't stronger than her or at least can't kill her without a special weapon or she's stong enough to put up a good enough fight, that it would be easier just to stab her in the back).