Satyrs are half goat half human creatures. Grover Underwood is a Satyr and he is also Percy's keeper or protector. He goes on the quest with Percy hoping to succeed so he can get his searchers license so he can help find, Pan, the leader of the satyrs, he went missing and now all the satyrs have to get their searchers license and look for him, and Grover hopes to be the one who finds him.
