Piper McLean is a fictional character from the book series The Heroes of Olympus, written by Rick Riordan. She is a demigod, the daughter of Hermes, the Greek god of travelers and thieves. Piper is known for her charm-speaking ability, which allows her to influence others with her words. She is also a skilled fighter and a member of the Camp Half-Blood community. In the series, Piper embarks on various quests alongside her friends, including Jason Grace and Leo Valdez. Her character is notable for her loyalty, bravery, and determination to protect her loved ones. Piper's journey explores themes of identity, friendship, and the challenges of being a demigod.