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, Johngalli 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 Ermes Costello defeats her. F.F takes the form of the dead prisoner Atroe 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 Ermes' stand to destroy his tongue.

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

Jolyne and Ermes find a giant hole in the ground in the hospirtal room where Pucci and Versus just were. Jolyne decides to lower herself down using her string, and after descending to the bottom and going through a tunnel she inexplicably finds herself inside of an airplane, complete with passengers and flight-attendants, who all seem unfazed by her sudden appearance. Looking out the window, Jolyne sees Pucci, Versus, and his stand Under World, who all appear to be standing in the tunnel that she was just in. Under World declares that he will go and cut the rope, and Jolyne begins screaming for Ermes to pull her back up.

After a few moments, the echoes of Jolyne's voice finally reach Ermes, who begins pulling her up. Jolyne seems to phase through the top of the airplane, and sees Under World about to cut the "rope". Yelling for Ermes to pull her further up. Once in range Jolyne immediately unleashes Ora Ora Ora but Under World easily evades by burrowing into the roof of the cave. Under World then arrogantly welcomes Jolyne to the "hole" and tries to cut the rope with his hand. However, before he can do so, Jolyne attaches part of the rope to a pen, and partially cuts it in a way such that it flies forward and pierces Under World's neck, who falls backwards crying in pain.

Pucci warns Versus not to press his luck against the fighting experience of Jolyne and recommends that he let her escape so that they can wait for the New Moon. Jolyne begins ascending the rope, but Ermes who hears Jolyne coming looks down to see Sports Maxx, who asks her how it felt getting revenge for her sister. Ermes nearly drops Jolyne who asks what is wrong. Once Ermes begins pulling her up again, Sports Maxx appears, telling her that the ground has a memory of everything that happened upon it. For whatever reason, Sports Maxx goes into further detail saying that Versus's stand Under World can "excavate" memories, such as a plane crash that occurred in 2005. Ermes tries to attack Sports Maxx, who crumbles away instantly, causing both her and Jolyne to fall down into the airplane. The flight attendant tells them that the plane is expected to crash at 9:33, whereupon they both look up to see the clock that reads 9:29.

Jolyne and Ermes immediately begin looking around for an exit, but the flight attendant informs them that they will all burn to death, because of a problem with the fuel. The passengers inform them that they are "remnants of memories, recorded by the earth". Meanwhile, Versus harshly snaps at Pucci when he asks if Versus can speed up the process. Jolyne devises a plan to open the door of the plane while Ermes holds the rope, attempting to use the air force to accelerate her body and attack Versus and Pucci. Instead, Jolyne finds herself in the cockpit of a Grumman F-14 Tomcat, whose pilot is trying to keep control of the craft despite most of the right side of his body being blown off. The rope that Ermes is holding suddenly snaps leaving Jolyne stuck. However, Jolyne hears the police at the top of the hole and uses Stone Free to get one of their radios.