Joseph is a teenager of above average height with an impressive physique, as noted by Lucy. He has short light hair styled in a buzz cut with three small spheres in the center. Under the spheres, two strands of hair stick out over his forehead, with one strand being longer than the other.
He wears a cashmere V-neck sweater with a striped collar. On the left of his sweater is a symbol of a large horseshoe framing an image of the dark silhouette of a rearing horse's head, similar to Johnny Joestar's hat. He also has a collared long sleeve shirt underneath his sweater, with buttons beside the collars. Joseph wears baggy shorts with a waist bag on each side and geta sandals. The Japanese spelling of his name is carved on his geta.
Joseph inherits the Joestar Birthmark on the back of his shoulder.
Joseph is a polite teenager who doesn't hesitate to help an elderly woman retrieve her stolen luggage from a thief. He formally refers to Lucy as "madam" before learning her name and cares for her well-being when she starts coughing. His concern for Lucy's health extends as far as traveling back with her to America to make sure she would be okay on her voyage and flight. He is also knowledgeable of Morioh's history and landmarks.
After witnessing the death of Lucy's driver and seeing for himself that the Radio Gaga Incident is true, Joseph acts cautiously and prioritizes their safety. He pleas to Lucy that they should leave, not caring about getting the payment for his job.
Joseph's Stand is similar to that of his counterpart, capable of producing vines which he can control. Unlike the original Hermit Purple, this Stand also has a somewhat humanoid shape with at least a fully formed head. The vines emerge from his birthmark and wrap around his arm.
Joseph is uncannily proficient at throwing his getas. He is able to throw them with a great deal of precision, for instance knocking down a running thief with them, or managing to throw a geta between the plates of Radio Gaga.
Born Joseph Joestar, he is the son of George Joestar III, and the grandson of Rina Higashikata and Johnny Joestar. He was named by his grandmother Rina who lived with him in S City. His name spelled in Japanese, Josefumi (仗世文), earned him the nickname "Fumi" (文).
Radio Gaga Incident
Joseph travels to the station in S City to pick up his girlfriend, planning to go on a date to an amusement park and then go eat sushi. Before his girlfriend arrives, he witnesses a thief steal an elderly woman's luggage when the thief bumps into him. Joseph quickly kicks his sandal at the thief from behind which knocks the man down. As the man runs away, Joseph retrieves the woman's luggage and returns it to her.
The woman offers Joseph 20,000 yen to be her local guide around the city and to carry her heavy equipment. However, Joseph refuses because of his plans with his girlfriend. He notices her holding a photograph of an orchard to which he calls the place of "The Radio Gaga Incident", a place of bad luck with numerous deaths in the past. Joseph's girlfriend arrives in the station, although Joseph realizes that the thief robbed his wallet before running away, forcing Joseph to set the date aside and accept the woman's offer. She introduces herself as Lucy Steel, working for the Speedwagon Foundation specializing in botany and geomorphology. He wonders if she was going to the orchard because of a crime that had happened there, but she says that she had come from America to investigate the site as her "mission", as if it was a command from heaven. Joseph finally introduces himself using his nickname, Fumi.
Joseph, Lucy, and Lucy's driver later arrive at Morioh's hunting grounds near the orchard owned by the Higashikata Fruit Company. As Lucy inspects the site and observes the Higashikata house with a telescope, Joseph finds the remains of a bird under his foot. He freaks out after Lucy's driver appears behind him, seemingly entranced by a voice only he can hear. He begins to strip down naked and approaches the Guard Rail, just like the victims in the local legend. Panicking, Joseph calls Lucy's attention before a truck passes on the road and the driver disappears. Joseph inspects the remaining clothes and only finds a severed hand. He tells Lucy to flee as soon as possible but she refuses, explaining that she came to Morioh after discovering that a plant named the "Locacaca" had been growing in the cursed land that was similar to the Devil's Palm in America. Suddenly, Lucy hears strange voices and is sucked into a gap between the guard rails.
Realizing the situation, Joseph drags Lucy away from the guard rail. Lucy profusely apologizes for involving him in her mission to find a plant and explains that the guard rail, Radio Gaga, must be a new type of creature protecting something. She suddenly coughs up blood, prompting Joseph to drag her towards the car before the bloodied remains of the driver pulls them back, seemingly controlled by Radio Gaga. With no other choice, Joseph exchanges positions with Lucy and lets himself be dragged by the driver. Lucy spots a distinct birthmark on the back of his shoulder and realizes that he is a Joestar, connecting them in her mission. She tells him to start the car engine, knowing that he has his own Stand. Joseph unleashes his Stand to drag the car and throw it towards Radio Gaga. He reveals his real name to Lucy and tells his story to her while carrying her on his back. At the same time, Lucy sees a man in the distance planting a Locacaca on a pot before disappearing.
Later on, Joseph accompanies Lucy to her hometown in America. Unfortunately, due to the breakout of the second World War in 1941, he is unable to come back to S City because of blocked maritime transportation in the Pacific Ocean. He subsequently becomes Lucy's assistant, receiving an education and citizenship in New York. He later works at a casino hotel in Atlantic City, New Jersey. In 1952, he meets a woman from the Speedwagon Foundation named Suzi Q. They eventually marry and she gives birth to Holy Joestar-Kira.
- “Are you all right, madam? Here's your bags.”
- “By the way, that place in the photo... That's the orchard of the Radio Gaga Incident. [...] That place... it's unlucky. People died there. Multiple times.”
- “They call me Fumi-kun.”
- “Let's get away from this place!! The Radio Gaga Incident wasn't just some made up story! Go call someone! We'll look for the driver with the police! I... I wanna go home!”
- “I told you, the ghost story was real!! I don't care about the job payment anymore! You get it too, right?! The driver's gone!! He's probably already dead! I just wanna get out of here!”
- “All the living things I know, aren’t as hard or dry as that!!!”
- “It's "Joestar"... My name is Joseph Joestar. My Japanese name is written as Josefu, so I'm called Fumi.”