What happened to Polnareff's sister: a factual relationship overview

Jotaro Kujo's ally Jean Pierre Polnareff from JoJo's Bizarre Adventure frequently prompts questions about his sister, whose storyline is tied to the series' tragic tone and themes of revenge and redemption. In canon, Polnareff's sister is introduced early as a vulnerable figure whose death propels his vendetta against J. Geil, the man responsible. This overview explains her brief but pivotal role, the canonical outcome, and how her fate shapes Polnareff's motivations across parts of the series. The following sections clarify her identity, key appearances, and lasting impact on Polnareff's character arc using only sourced material from the manga and its official adaptations.