The Stand User is a bald man with something resembling a dent in his head, an aggressive expression, and armor-like clothing.
Famicom Jump II
When Jotaro travels to Sutangari Town, he discovers that all the people were turned into stone statues, including his friends Kakyoin; Polnareff; Avdol and Joseph. After a long search, Jotaro finally discovers the Stand User in a nearby Cave and managed to beat him with Star Platinum. When Stand User is defeated, the people affected by his Stand returned to normal, while he disappeared.
Another heroes scenario:
When the hero travels to Sutangari Town, he discovers that all the people were turned into stone statues. Later, he finds Jotaro in an oasis, who leaves the place in search of the culprit of that situation. The hero follows him until he finds Jotaro again, just in time to observe the fight between him and the Stand User. When Stand User is defeated, the people affected by his Stand return to normal.
This User's unnamed Stand turns anyone into stone that its user defeats, or is about to defeat, with a special punch.
This transformation renders its targets immobile. However, some targets can sense what is happening around them and even talk; possibly because they also are Stand users. When the User is defeated, all targets revert to normal.
When not playing as Jotaro, one of the generic enemies in the Stand User's cave uses the same sprite of the Stand User, but colored purple.
Jotaro's scenario is one of the easiest in the game. Not only is he the only character who can summon his ability (Star Platinum) since the beginning, at level 1, he is the only character whose scenario doesn' t make the player fight the boss if he's not chosen. Because of that, Stand User is the only boss the player has the chance to avoid a battle with.