Star Birthmark

This birthmark appears in all people with Joestar blood as a star-shaped mark on the left side of the neck. Although Dio is not a Joestar, he has the birthmark on account of having grafted his head to Jonathan Joestar's body. After inheriting Made in Heaven, Enrico Pucci and Weather Report also have these marks on their bodies, as the stand partially originated from Dio's bone and they are biologically brothers.