D an G
D an G is one of the four people Enrico Pucci sent to the maximum security ward to assassinate Jolyne Cujoh. He uses his automatic Stand, Yo-Yo Ma, to attempt to kill her and Narciso Anasui in the swamp near Green Dolphin Street Prison.
D an G is a man of average build and height, wearing a fleece-like multi-colored toga, wristbands, and a Pickelhaube.
Like his Stand, D an G has a soldier style helmet. It's unknown why D an G wears an eye-patch; while he was fighting with Foo Fighters, he was shown to have an otherwise normal-looking eye underneath it.
In most of his time shown, he has a completely stoic personality, but it's assumed that he is hateful and homicidal judging by the actions that got him arrested.
It's explained that D an G is held in the Maximum Security for his protection because his identity as an ex-cop in prison would otherwise get him killed.
- Main article: Yo-Yo Ma
Yo-Yo Ma is an automatic long-range Stand. It is mostly humanoid, able to perform complex tasks, and converse with people, but is weak. Its saliva is extremely corrosive.
In 1999, D an G was a police officer who believed in Nostradamus' prophecy of the end of the world coming in the year 2000. Because of this, he went around shooting several people he didn't like near the start of the new millennium, using his status as a policeman to erase his traces. Once the panic died down, he was quickly arrested and sent to Green Dolphin Street Prison for 20 years. Because ex-cops are often murdered in prison, he was placed in the punishment ward for his own protection. It's unknown if he was given his Stand by Pucci or developed it.
D an G was one of the four Stand users assigned to kill Jolyne in the maximum-security facilities along with Kenzou. After the commotion caused by Survivor and DIO's bone, he touched Guccio's shoulder and triggered the trap, inside Guccio, causing Guccio's ribs to burst from his chest and impale his arm. Despite his sobbing, he sends Yo-Yo Ma after Jolyne.
D an G is retrieved by the prison guards and put in an ambulance. However, F.F. pursues him. Despite Whitesnake's protection, F.F. shoots itself, dispersing the plankton and making it infiltrate D an G's body. D an G dies, decapitated from the inside.