"Did YOU help US against CIRCE?"
Circe Invidiosa
Public DomainCirce Invidiosa - Credit: John William Waterhouse

Circe is a character from Greek myth, a sorceress or a minor goddess of magic best known for turning Odysseus' crew into pigs in The Odyssey. 

The Odyssey on Book Drum

There is also a DC Comics villain called Circe, a sorceress usually set opposite Wonder Woman. Her first appearance was in Wonder Woman #37 in the 1940s, and she is still active today. The Fates could be referring to either version of the character, since no version of them has any documented rivalry with either version of Circe.