Argus's Clique: Monster-Human Alliance
This club is all about promoting peace and understanding between monsters and humans. These kids spend their time passing out flyers that say "Make Love Not War." Argus isn't very popular with his other group members. Yeah, he's a big crazy giant covered with eyes, so you'd think he'd fit in. Unfortunately, though, he has a history of monster slaying—like with that slimy dragon lady Echidna.
Scylla
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?
The Cyclopes
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.
The Minotaur
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.
Medusa
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.
Grendel and Grendel's Mom
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.
Circe
In the Odyssey, Homer tells us that Circe is a beautiful sorceress with a tendency to turn men into beasts when they venture onto her island. She's an immortal woman with magical powers, who (after turning his men into pigs) convinces Odysseus to stay on her island for one year. She herself lives on this island attended by ladies-in-waiting and surrounded by beasts who were once men. Sounds like a sweet life, right? Eh, maybe not. She's pretty lonely.