Vinegar Doppio's stand, or supernatural power, is called "Epitaph." This power allows him to see a short amount of time into the future, which gives him an advantage in battle. However, Doppio has a split personality, and when his other personality takes over, his behavior becomes erratic and unpredictable. Despite his strange personality and abilities, Vinegar Doppio is a formidable opponent in battle and plays a significant role in the story of "JoJo's Bizarre Adventure."