Jean Pierre Polnareff is a fictional character from the Japanese manga JoJo's Bizarre Adventure. He went with Jotaro Kujo and Joseph Joestar to get revenge for his sister, who was raped and murdered by J. Geil.
He is the only non-Joestar to have survived the adventure. Polnareff would later resurface 12 years later to join Giorno Giovanna's group in the 5th part of the JoJo's Bizarre Adventure, the Golden Wind.(Source: Wikipedia)