Grover Underwood is a satyr who is Percy's best friend.
She is the daughter of the goddess Athena and mortal history professor Frederick Chase, from whom she has an extensive paternal family.
Annabeth has blond hair, stormy gray eyes, and tan skin.
He is the main protagonist and first-person narrator in the Percy Jackson & the Olympians series and appears in every book of the Camp Half-Blood chronicles except The Lost Hero and The Dark Prophecy.
In his most recent appearance in The Hidden Oracle, the seventeen-year-old Percy states that he and his girlfriend Annabeth Chase plan to finish senior year in New York before he heads to New Rome University.
Grover is twenty-eight in the first novel, but because a satyr's lifespan is twice that of a human, he is still physically a teenager.
Grover is a very sensitive and nature-conscious person.
Her fatal flaw is hubris, which is excessive pride.
She is also described by her teacher Chiron as "territorial about her friends", which is manifested in several moments of jealousy and distrust.
Her attempts to bring Luke back into the fold are an important theme in the books.