Percy lives in Manhattan, Upper East Side, and is a New York Yankees fan. He is Annabeth's boyfriend. Percy has black hair and sea-green eyes. The powers he inherited from his father Poseidon include the ability to control water, boats and ships; to create small hurricanes; to breathe and see clearly underwater; and to talk to horse-like creatures. He is also a good swordsman. Throughout the series, Percy uses a ballpoint pen named Anaklusmos (Ancient Greek for "Riptide") for battle; the pen can change into a celestial bronze sword. His fatal flaw is excessive loyalty.