Circe first appeared in Wonder Woman #37 in 1949. As a powerful witch, Circe has the ability to transform reality and is known for creating illusions, messing with minds and... erm... turning people into animals. Yeah for some reason she really likes transforming people into animals and she once transformed Wonder Woman into a pig!
Circe also possesses a magic mirror which allows its holder to alter their physical features.
HMMM...HER NAME SOUNDS FAMILIAR.
Well that's possibly because Circe can be traced back to Homer's Odyssey where she invited Odysseus' ship mates to her home so she could drug them and turn them into pigs!
JEEZ, WHAT IS HER OBSESSION WITH PIGS?!
Not really sure, it seems that when she gets pissed off (or possibly horny) she turns people into animals and pigs seems to be her thing. However on this occasion it all ended well and she gave birth to three of Odysseus' children.
Well, kind of. She transformed a bunch of other people into animals because they also pissed her off, including King Picus (she turned him into a Woodpecker) and Scylla (who ended up with six dog heads).
WHAT A BITCH!
Yep. Circe is a sorceress (a male version of a sorcerer) and as such she has supernatural abilities that allow her to perform all kinds of spells.
SO SHE'S A SORT OF WITCH.
Yeah, almost, only she's a lot hotter than your usual kind of witch.... unless your usual kind of witch happens to be Sabrina the Teenage Witch... or those gals from TV show Charmed.
Either way, she's a witch nonetheless.