Circe is a sorceress who rules an island in the Mediterranean Sea. In Fall of the Trident, upon the arrival of Odysseus and his men on the island, she transforms them into pigs, and subsequently transforms Arkantos and Ajax into pigs after they too arrive on the island. With the help of Zeus, the men are transformed back into human beings, and afterwards attack and destroy Circe's keep before escaping the island.
Circe wields a staff and has the ability to shoot lightning. However, this is the only attack she has.