Johngalli A.

Jongalli A is an antagonist from Part VI: Stone Ocean.

About
Ex-soldier sentenced to 7 years in prison for murder.

As a follower of Dio he wants to take revenge on the Joestar bloodline by framing Jolyne Kujo, hoping to kill her in prison.

Even though he's blind he has a way to tell his surroundings by an inhuman ability of feeling wind movement, he's able to keep a sniper rifle with him even in prison by disguising it as a cane.

Stand
Manhattan Transfer