Sirens

These cunning creatures have brought many people to their doom.

Diet
Misguided sailors.

Behavior
They are very crafty using their power and environment to kill their prey for them.

Habitat
They're island in the Sea of Monsters

Power
Their songs show you what you really want. They make you realize things about yourself that you don't even realize.

Appearance
They look like a cross between a old woman and a vulture. They are rather foul looking creatures. Their faces change in an interval of familiar people.

Tips for demigods
Plug your ears and ignore them.