Jack is known as
the "Killer Demon"
from England. Considered by Dio a weak man's Nosferatu; Jack has something to prove. He wants everyone to remember that
before there was the term 'serial killer, there was... "Jack the Ripper." He
eventually joins Zeus
because he promised him many strong people for him to cut. He is based
off of the real life serial killer, Jack "The Ripper" (just like Jack
from Capcom's Power Stone series).