Being a high school student, Josuke Higashikata is a tall and strong teenager with a strange hairstyle. Actually, Josuke is the son of Joseph Joestar, making him a member of the Joestar family. He caught a serious fever in the year 1987, and after that, he awoke a spirit he can summon from his body.
After meeting his older nephew Jotaro Kujo, Josuke knows that the ability he has is Stand power. When Dio Brando awoke his stand while merged with Jonathan Joestar's body, Josuke as a descendent of Jonathan Joestar also awoke his own stand, which is the spirit he can summon. JOsuke decides to name his stand Crazy Diamond and protect his hometown from an evil Stand user Yoshikage Kira.
Stands are entities generated from people's life energy, each stand has a unique superpower, and people who have abilities to summon stands were called "Stand Users". Josuke's stand is named Crazy Diamond, it looks like a muscular man with pink skin, a blue bucket-shaped helmet, and armors covering his chest, shoulders, elbows, fingers, knees, and legs. Josuke can summon it out whenever he wants.
Crazy Diamond is a close-range Stand, so it stays about 2 meters from Josuke's body after being summoned. The power of Crazy Diamond is to fix broken things, including healing wounded people. Aside from his fixing ability, Crazy Diamond has excessive strength and he can punch extremely fast.
- Fix things: Crazy Diamond can fix any broken things he touched. When something is shattered into pieces, by touching it, Crazy Diamond can make pieces fly back and reshape this object. This ability also can be used to heal wounds, including decapitations. However, this ability cannot bring dead people back to life. Although Josuke fixed a boy who was completed blown to pieces by an explosion by immediately touching him when he exploded. This leads to a theory that Josuke can bring physically dead people back before his soul left his body. This fix ability also can reshape broken things into different shapes.
- Strength: Crazy Diamond's strength is rated A. Jotaro even once said Crazy Diamond's strength is comparable to Star Platinum.
- Fast Punches: Crazy Diamond can throw powerful punches with incredible speed that created multiple afterimages. His attack is too fast that Yoshikage Kira's Killer Queen cannot keep up. Crazy Diamond shouts his battle cry "Dorararara" while doing fast punches.