Jolyne Cujoh, daughter of Jotaro Kujo and heir to the Joestar lineage, bears the family’s star-shaped birthmark on her left shoulder. Her early years as a rebellious teenager stemmed from paternal neglect, driving her to delinquency and petty crimes to provoke her father’s attention. At 19, she is framed for a fatal car accident orchestrated by her boyfriend Romeo, landing her in Green Dolphin Street Prison. The charges escalate to murder under the manipulation of Enrico Pucci, a priest loyal to DIO, setting her tragic journey into motion.  
Incarceration becomes a crucible for Jolyne’s awakening. Pricking her finger on a Stand Arrow shard concealed in Jotaro’s locket unlocks her Stand, Stone Free. This ability lets her unravel her body into a resilient string, enabling combat versatility, eavesdropping via vibrations, constructing barriers, and manipulating objects. She employs it creatively—mending injuries, crafting a Möbius strip to defy gravitational anomalies, and weaving traps.  
Her growth from impulsive resentment to steadfast leadership is fueled by reconciling with Jotaro, whose stolen memories and Stand by Pucci become her driving mission. Allies like Ermes Costello, the enigmatic child Emporio Alniño, and Foo Fighters, a sentient plankton colony, deepen her empathy and temper her former self-centeredness.  
Battles against Pucci’s Stand users push Jolyne to extremes. She leverages brutal yet calculated strategies—using flames to disorient foes, exploiting Stand weaknesses, and enduring body-altering horrors and memory loss without faltering. Her moral code avoids lethal force unless necessary, prioritizing survival and justice.  
The final clash with Pucci sees Jolyne sacrificing herself to protect Emporio, ensuring the priest’s defeat. Her death triggers a universe reset, reincarnating her as Irene in a timeline freed from the Joestar curse. This rebirth underscores her enduring legacy of resilience.  
Visually, Jolyne’s athletic frame, green hair with braided accents, and spiderweb-patterned outfits mirror Stone Free’s string-based powers. A star-shaped navel piercing nods to her heritage, while later additions like a post-escape cape signal her transformation into a defiant hero.  
Her personality melds Jotaro’s dry wit—epitomized by her sighing catchphrase “Yare yare dawa”—with fierce loyalty. Initial distrust from past betrayals evolves into unwavering dedication to allies, balancing sharp retorts with protective resolve. This arc cements her role as a bridge between the Joestar legacy’s past and future, embodying justice tempered by hard-won compassion.