Scylla



She is a monster who lives under a rock. No, really. She lives under a completely dangerous rock along the strait of Messia. Every time ships would pass, she'd prove herself as a horrible threat to wrecking them. In the Odyssey, she reportedly ate six of Odysseus' companions.

Scylla was born to Phorcys as a nymph. Glaucus, a fisherman-turned-sea-god, was madly in love with her, but the roads of their fates wouldn't meet as Scylla fled to land where he could not follow. Glaucus was depressed. He sought out for Circe the sorceress to whip up a love potion. While narrating the story, Circe was entranced by Glaucus' charm. She tried to go for it, but destiny didn't bring her into his arms. Circe grew furious. She wanted to take it all out on Scylla, not Glaucus. Filled with anger and hatred, she prepared a vial filled with poison and poured into Scylla's bath. Once Scylla came in contact with the water, her body started to transform into a vicious monster. Heads and feet started to pop out of nowhere. She started to look hideous. From that day forward, she thrashed everything that came her way, taking all of her hatred out on them.

http://www.pantheon.org/articles/s/scylla.html