Johnny was a greaser in the late 1950s who was responsible for Royce Clayton's death.
At one time, he challenged Royce to a drag race, which Royce unwittingly accepted. Little did he know that, prior to the race, Johnny had cut the brake line that caused Royce to lose control of his car, which had flipped three times and exploded on impact while dragging him underneath, killing him instantly. What became of Johnny since that event remains unknown. Some merely think he was apprehended by the authorities, while others believe that Royce, as a ghost, may have even killed Johnny out of vengeance.
Royce Clayton's ghost was later captured by Cyrus Kriticos to become "The Torn Prince" in The Black Zodiac, a collection of 13 earthbound spirits, as listed in The Arcanum, needed to power Basileus' Machine and open the Ocularis Infernum.