Grover Underwood

Grover Underwood is one of the main characters in Rick Riordan's series novel Percy Jackson and the Olympians and the Chris Columbus film adaption Percy Jackson and the Olympions: the Lightning Thief and it's sequel Percy Jackson: Sea of Monsters. He is Percy Jackson's best friend and guardian. He also served as protector to Annabeth Chase, Thalia Grace and Luke Castellan when taking them to Camp Half-Blood.