Jean Pierre Polnareff is the second-to-last addition to the Crusaders, who joined after he fought and was defeated by Muhammad Avdol.
Polnareff is the stereotypical "good-natured klutz." He is heroic and protective of those he loves but is not very bright (although he has shown lots of cunning and strategy throughout the series). He is very impulsive, loud, and quick to jump into action without considering the risk, character traits that have landed him in lots of trouble. However, he is sincerely dedicated to doing good and is a good man who can watch his friends' backs. He also fancies himself as a ladies man, but his personality implies that he overestimates his actual prowess.
Out of all the characters in the series, Polnareff is the one who has the least problems showing his feelings, and he adds a lot of humor and warmth to what would otherwise be a pretty cold team since Kakyouin and Joutarou in particular are very cold characters. Indeed, while he may sometimes be seen as the comic relief of the series, Polnareff's companions appreciate his good nature and trust him to help them win when a tough battle arrives.
He went with Joutarou Kuujou and Joseph Joestar to get revenge for his sister, who was raped and murdered by J. Geil. His Stand is Silver Chariot.
(Source: Wikipedia, Jojo Wikia, edited)
