At first, I thought that the first part of Jojos Bizarre Adventure featuring Dio recruiting Jack the Ripper and vampirizing him was just a way to further amplify the magnitude of Dio's evil. Namely, he got the one of the scariest people in real-life England to join his side. Only much later did I realize what Araki was playing with. The battle between Jonathan and Jack ends with Jack being disintegrated by hamon force. This doesn't just explain why Jack the Ripper's killings ended without an arrest. It's also, in Jojoverse, why Jack was never identified with anyone's birth name. How do you identify someone who now only exists as a fine film of dust?
In Part I, Dio had the power to even freeze blood to slow his opponents -such as Jonathan- down in combat. Why didn't he use it against Jotaro? Not his body, so he couldn't do it.
The "Steel Ball Run" arc of Jojos Bizarre Adventure combines this with Religious Horror, when it becomes apparent that the cross-country race used to frame the story is just a cover for President Valentine's agenda of collecting the scattered corpse of Jesus. When he succeeds in gathering all the parts into one vessel, Valentine's powers evolve and create an effect which draws good fortune toward him and casts misfortune away. When Johnny Joestar tries to shoot him, this effect protects Valentine, but the misfortune has to be re-directed elsewhere, resulting in children being killed on the other side of the world. Given the source of this power, it casts dark, dark questions on the miracles in the New Testament.
