Main Characters In Diamond Is Unbreakable

Josuke Higashikata 

Josuke is a high school first-year residing in the town of Morioh. He soon meets Jotaro Kujo, who informs him that he is Joseph Joestar's illegitimate son. After his grandfather dies, Josuke takes it upon himself to protect his beloved town from malevolent Stand users. Josuke wields Crazy Diamond, a powerful Stand with the power to repair almost anything.

• Intelligence: Josuke is extremely quick to get on his feet under almost any circumstance, as he is very aware of the immediate surrounding as well as his own capabilities.
• Physical fineness: Josuke possesses substantial athletic ability.
• Crazy Diamond: It is a Close-Range Stand, which is characterized by its physical might and speed at the cost of a short range of 2 meters. Its basic characteristics are: 
  
• Super Strength: Crazy Diamond possesses immense physical strength.
• Super Speed: It is estimated that its strikes exceed 300 km/h.
• Precision: It can effectively fire off a rifle bullet from its fingers up to 50 to 70 meters when Josuke concentrates.
• Restoration: Crazy Diamond's unique ability is to restore objects or organisms through touch. It can repair the damage, heal injuries, revert chemical changes and complex structures to their raw components.

Koichi Hirose 

Koichi is a timid high-school first-year who befriends Josuke Higashikata and then finds himself entangled in the world of Stand users. He also becomes a Stand User and wields Echoes.

• Egg Form: Echoes was born in extremely unusual circumstances. Koichi was stabbed by the Arrow, however healed by Josuke with Crazy Diamond before he could die and thus Koichi survived, acquiring a powerless Stand in the process.
• Echoes ACT1: It is a long-range Stand. It is very weak and also slow. However, it has the longest range of all ACTs and can go up to about 50 meters from its user, making it useful as a scouting Stand. 
  
• Sound Generation: Echoes ACT1 can write anything on any surface or person. If it is an onomatopoeia, a sound related to the onomatopoeia in question is produced. The sound and words are said to not really be heard but to be as if they came from inside the person.
• Echoes ACT2: Although ACT2 is still physically weak, it now possesses a stronger and more versatile power than its previous form, making it more suited to direct confrontation. 
  
• Sound Effect: Echoes' second form increases its sound abilities beyond its first form's capabilities. Echoes can write a sound effect on any surface. When the sound effect is touched, an effect related to the sound is produced, either affecting the person who touched it or the object which the words are inscribed on.
• Enhanced Speed: ACT2 gains a massive increase in speed, fast enough to give the impression of disappearing into the air.
• Echoes ACT3: It has a much shorter effective range. It is extremely fast and noted to be stronger. 
  
• 3 Freeze: ACT3's signature ability is 3 Freeze with which it applies a "freezing" or stopping effect by greatly increasing the weight of its target by punching it.

Okuyasu Nijimura 

Introduced as an antagonist, Okuyasu soon becomes Josuke Higashikata's best friend. They stay close friends and tackle malevolent Stand users together. He is also Keicho Nijimura's little brother and also a Stand User wielding the fearsome The Hand.

• The Hand: It is a heavily battle-oriented Stand. Its unique power of space erasure makes it theoretically one of the strongest Stands of Diamond is Unbreakable. 
  
• Erasure: Anything The Hand's right palm touches when it does a swiping motion with its arm is erased from this universe, be it physical matters or space itself.

Rohan Kishibe 

A successful professional mangaka, Rohan is often roped into paranormal events while conducting research for his latest manga. He is a Stand User who uses his Stand, Heaven's Door, to transform others into books and read them for inspiration.

• Dexterity, Draftsmanship: Rohan is an exceptionally talented draftsman, capable if he chooses of finishing manga pages of quality at superhuman speed.
• Heaven's Door: It is a weak close-range Stand unsuited for direct combat, but has several powerful abilities. For an inquisitive mangaka like Rohan, Heaven's Door is a handy way to gather research material out of people's pasts without the hassle of an interview. 
  
• Book Transmutation: Heaven's Door's basic ability is to turn people into books, pages unfurling from their bodies in the shape of whatever body part it opens from. The contents of the books contain detailed and absolutely true information on their subject, including physical characteristics, memories and thoughts from their earliest to their latest, personality, and any details on their Stand, if they have one.
• Memory Removal: By removing pages, Rohan causes his target to lose any memories detailed there, along with a proportionate quantity of body mass, making them lighter.
• Written-In Commands: By writing into the pages of a person or object transformed into a book, Rohan may alter or erase memories, or put hypnotic-like commands into the person's mind.

Kujo Jotaro 

Jotaro is a delinquent who lives an ordinary life until the Joestar Family's old enemy, DIO, returns. Jotaro travels to Egypt in order to save his mother and stop the Vampire once and for all. Wielding the incredibly powerful Star Platinum, Jotaro is the first JoJo introduced with a Stand, and is among the most well-known characters of the series.

• Start Platinum: is a close-range Stand, with a basic reach of only 2 meters from Jotaro's body, but with incredible strength, speed, and precision. It is one of the most powerful Stands featured in the series.
• Super Strength: Star Platinum possesses immense strength.
• Super Speed: Star Platinum boasts phenomenal speed.
• Self-Preservation: Star Platinum possesses the awareness and reaction speed to protect Jotaro in many instances that he himself seems unaware.
• Precision: Star Platinum is incredibly precise.
• Enhanced Eyesight: Star Platinum utilizes eagle-like eyesight throughout Stardust Crusaders.
• Ora Ora Rush: Star Platinum's primary method of attack. It throws an extremely fast but precise barrage of powerful punches to pulverize an opponent or destroy objects.
• Star Finger: Star Platinum can forcibly extend its middle and index fingers to a length of one or two meters, allowing it to perform sneak attacks and stab opponents from afar.
• Star Platinum - The World: During the final battle with DIO in Stardust Crusaders, Star Platinum awakens the ability to stop time. The technique is referred to by Jotaro as Star Platinum: The World 
  
• Time Stop: When activated, Star Platinum is able to halt the flow of time for a brief moment, causing everything around him to appear frozen in place. In Jotaro's prime, the ability lasted 5 seconds, but decreased over time due to neglect from its user.