OVA
Description
Noriaki Kakyoin is a high school student who becomes a central ally in the journey to defeat DIO. He first appears as an enemy, having been brainwashed by DIO through a flesh bud implanted during a family trip to Egypt. Under DIO's control, he attacks Jotaro Kujo, but after being defeated and freed from the flesh bud, he joins the Joestar group out of gratitude and a desire for redemption. He is the youngest member of the group, roughly the same age as Jotaro.

Kakyoin is intelligent, calm, and analytical. He rarely shows strong emotions and prefers to observe and assess situations before acting. He is proud and dislikes bowing to others or being disrespected, but he is also deeply loyal to those he respects. His childhood was isolating because he could see Stands when others could not, leaving him feeling unable to connect with ordinary people. The journey with the Joestar group gives him his first real friendships. His motivations are driven by a sense of obligation to Jotaro for saving him, a need to atone for his actions while brainwashed, and a genuine care for his companions.

In the story, Kakyoin serves as the team's strategist and analyst. He excels at deducing enemy Stand abilities and weaknesses, often identifying crucial details before the rest of the group. His role is proactive: he scouts ahead with his Stand, sets traps, and provides long-range support. He is not a frontline brawler but a tactical thinker who values teamwork. His most critical contribution occurs in his final fight, where he learns the secret of DIO's Stand and relays the information at the cost of his own life.

Kakyoin's key relationships include a close bond with Jotaro, who he views as a peer and a friend. He shares a respectful dynamic with Joseph Joestar, the elder leader, and a friendly rivalry with Jean Pierre Polnareff, often trading dry humor. He also respects Muhammad Avdol and interacts with the dog Iggy. His relationship with DIO is one of hatred and a desire to overcome the weakness that allowed him to be controlled.

Kakyoin's character develops from a lonely, reserved teenager into a confident and selfless friend. He starts the story isolated by his unique ability, but through the Crusade he finds belonging and purpose. He is willing to sacrifice himself for the group, as shown in his final moments when he uses his last strength to send a message that enables Jotaro to defeat DIO.

His notable ability is his Stand, Hierophant Green. It is a long-range Stand that can extend its body into long tentacles, allowing it to travel up to a hundred meters from Kakyoin. The Stand can unravel to fit through small spaces, enter people's bodies to control them, or form a web-like barrier for sensing enemy movements. Its signature attack is Emerald Splash, a barrage of emerald-colored energy projectiles fired at high speed. Hierophant Green is weak in close combat but excels at range, scouting, and strategy, reflecting Kakyoin's own preference for wit over brute force.