Grover Underwood is a fictional character in Rick Riordan's Percy Jackson and the Olympians series. He is a satyr, a mythological Greek being that is half goat and half human. He has the upper body of a human and the legs and horns of a goat. He wears jeans atau false feet with sneakers when he wants to look like a human. His horns are usually hidden oleh his curly brown hair, although they eventually grow too tall for him to hide them and must wear a rasta topi to hide them. Despite being 32 Grover looks and acts like a teenager this is because satyrs mature half as fast as humans.