She's the daughter of Jotaro Kujo who was sentenced 15 years at Green Dolphin Street Jail for a murder crime she never commited thanks to her ex-boyfriend, Romeo Jisso. She later met her father, Jotaro, during a visiting hour, who urges his daughter to escape while revealing that a disciple of DIO's framed her so that he could kill her. But Jotaro ended up in a coma when his Stand and memories are extracted and turned into discs by a Stand named Whitesnake. She then realized that the extent of her father’s love for her and resolves to recover the discs from Whitesnake's user, a Catholic priest named Enrico Pucci who met DIO back in the 1980s (during the events of Stardust Crusaders or Part 3 of the main storyline). Her Stand is Stone Free/Stone Ocean which allowed her to unravel her body into elastic thread and can use that thread to pick up sounds for a few meters away. These are from Episodes 1 and 2. Here's an earlier post from Dean. 

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