Jolyne Cujoh/History

History
Jolyne Cujoh is the sixth generation Joestar in the Joestar bloodline (counting Jonathan Joestar as first). Her childhood was often spent without her father, as Jotaro was mostly at work even when Jolyne was in need of the most attention. When she was 14, her life as a teen began to spiral downward upon being mistaken for a suspect in a robbery she didn't commit and then fleeing from an officer by stealing a motorcycle. Upon being arrested and detained in a holding cell, falsely charged with the crime, she and her mother pleaded her innocence and even begged Jotaro to bail her out. However, as he did not believe her, in the end she was sent to juvenile detention.

When her mother divorced Jotaro, Jolyne became even more frustrated when he left the family. Soon, she joined the Hell Riders motorcycle/carjacking gang and spent more time getting into trouble. At 19, having cleaned up her act and left the gang, she went on a date with a preppy rich boy named Romeo. Upon driving home, Romeo and Jolyne were in a car accident, Romeo having fatally hit a pedestrian. Worried that he would be charged with reckless driving and dropped from a university's waiting list, Romeo decided to take the corpse and dump it somewhere, persuading Jolyne to help him and forget about the entire incident. A few days later, however, Jolyne was found at home and arrested.

Stone Ocean (2011-2012)
While serving time in Green Dolphin Street Prison, she was confronted by Emporio to not initiate her visit with  her father which led to the explanation leading to Jolyne's frame-up by a follower of  Dio, Jongalli A who used  his stand to attempt to snipe her from the men's ward which ultimately placed  Jotaro in a coma resulting in his stand and memory disk being stolen by  Whitesnake.

In an attempt to receive the stand disk, she encounters F.F. and after a lengthy confrontation in which she was assisted by Hermes Costello defeats her. F.F. takes the form of the dead prisoner Etro and becomes an an ally to Jolyne.

After receiving Jotaro's stand disk, she finds herself confronting other stand users before being placed in the maximum security vicinity where she fought more stand users (which resulted in the birth of the Green Baby and a bloodbath that only she survived. After defeating Miu Miu, she escapes from the prison and encounters Romeo who she requests money and a car from. Romeo, apparently sorry for his actions that led to her arrest, gives her a thousand dollars and a helicopter before appearing to call the police to report her whereabouts but in reality, he tells the police that he received a call from her (rather than say she was at her place), despite his nobility, Jolyne uses  Hermes' stand to destroy his tongue.

While in the helicopter, she encounters a random stand that makes herself,  Hermes and  Emporio partially blind and sick before crashing the helicopter. Jolyne fights Rykiel (a son of Dio)after learning of  his stand powers which included her igniting herself. Once the fight is finished, she, Hermes and  Emporio go to the hospital where  Pucci and another of  Dio's sons, Donatello Versace are planning to hide until the new moon in order to defeat  Pucci.