Billy looks kind of like the living dead.
Billy isn't Dandridge's roommate...he is Jerry's ghoulish servant.
He has been with the vampire for about one hundred and thirteen years.
He disposes of the victims bodies after Jerry is done with them and is his daytime guardian.
He helps Jerry kidnap Amy, Charley's girlfriend and takes her to the vampire's house.
Billy melts in your hands, not in your mouth.
Billy is shot in the head by Peter Vincent, when Peter and Charley come to rescue Amy.
Billy is killed, but Dandridge can raise his dead servant and does.
The unliving Billy-thing tries to kill the vampire-hunters...Peter shoots him several times to no effect.
Billy grabs Peter and is about to throw him, when Charley drives a stake through the zombie's heart.
Billy melts into a puddle of goo...and that's the end of him.
