Grover is a legendary Greek mythology's tie. Half-human, half-goat has a style which is the human body, but has the legs and he is a goat wearing a fake leg Grover, jeans and sneakers to conceal the legs of goats though he is 28 years old, but in the age of humans. There are tie-age growth age of half a man's 14-year old Grover in the first book. He also is a close friend of perfect si Jackson.