Is JoJo a vampire?

JoJo vampires are mostly seen sucking blood through blood vessels in their fingers. Dio Brando's sons show no indication of having inherited his vampirism, although on one occasion Giorno has been shown to use his and other vampires' characteristic "WRYYY" battle cry.

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One may also ask why is dio evil?

8 DIO: PURE EVI. Dio is the definition of pure evil. Throughout his life, Dio only harmed people. In part 1, he simply ate humans for the sake of increasing his own powers. He tried to kill his adoptive father, George Joestar, who was always kind to him. In respect to this, is leaky eye luca a stand user? He has no known Stand but uses a shovel as a weapon instead, which he uses to beat people with.

What was Diavolo's goal JoJo?

I am an emperor! My only goal is to remain at the top! Diavolo (?????, Diaboro) is the main antagonist of Part 5.