Vinegar Doppio is a side character and secondary antagonist featured in JoJo's Bizarre Adventure, Vento Aureo. He is Diavolo's younger, more innocent and eccentric personality. He thinks of himself as the most loyal subordinate to Diavolo, but in reality, the two are separate souls inhabiting the same body. It is ambiguous whether Doppio is truly a Stand User, but he is able to partially wield King Crimson in battle.

"Hello there! Do you need help with anything?"

(Doppio is holding a frog.)