Grover Underwood is a beloved character from the Percy Jackson series, created by author Rick Riordan. He is a satyr, a half-human, half-goat creature, who serves as the loyal protector and best friend of the protagonist, Percy Jackson. Grover is known for his kind heart, bravery, and a deep connection to nature, often communicating with animals and caring for the environment. Throughout the series, Grover embarks on numerous adventures alongside Percy and their friends, showcasing his growth from a timid character into a courageous hero. His humorous personality and unwavering loyalty make him a fan favorite among readers of all ages.