This club is all about promoting peace and understanding between monsters and humans. Circe really resents being lumped into this category, but her habit of turning people into pigs, lions, and horrible monstrous creatures makes a lot of people think of the sea witch as a monster herself.
According to some, Scylla was once a beautiful Nereid, or water nymph, who Circe transformed into a monster. Why? Well, a sea god named Glaucus, who Circe had a crush on, only had eyes for Scylla. The next thing Scylla knew, she was transformed into a horrible sea monster with six heads and a ring of snarling dogs growing from her waist. In older myths, Scylla was born monstrous, and Circe had nothing to do with it. What do you think?
These one-eyed giants are best known for their bad tempers and dim wits. They have a nasty habit of eating whomever they come across. The most famous member of the tribe is Polyphemus who was blinded by the hero Odysseus, but there are many more of 'em: Brontes, Steropes, and Arges are the sons of Uranus and Gaia, who got locked up by both Uranus and Kronos for the scary crime of being big and scary.
This angry thing is half-man, half-bull, and spent most of his life locked up in the mysterious Labyrinth on the island of Crete. Like the Cyclopes, the Minotaur is known for munching on a person or two every so often. His people-munching ways didn't last long, though: the Athenian hero, Theseus, came and stuck him with a sword.
This might be the only place where Medusa could possibly be considered "the pretty girl." Medusa is a Gorgon, a snake-haired creature so ugly that she turns people to stone whenever they see her. (Yeah, that's pretty ugly.) Medusa was killed by the hero, Perseus, who chopped off her snakey head.
In the epic Anglo-Saxon poem Beowulf, Grendel is a man-eating demon that lives in the land of the Spear-Danes and attacks King Hrothgar's mead-hall every evening. The narrator of Beowulf claims that Grendel's motivation is hearing Hrothgar's bard sing songs about God, which rubs his demonic nature the wrong way. Whatever the reason, every night, Grendel slaughters more Danes and feeds on their bodies after tearing them limb from limb. Although he can't be harmed by the blade of any edged weapon, Grendel finally meets his match when the Geatish warrior Beowulf defeats him in a wrestling match.