Ghoul is a coroner who works with Oracle. When a man was killed by a tech virus, Steph and Nick Gage bought him to Ghoul. Ghoul did an autopsy and saw the man had the same metal in his blood as previous victims. Steph borrowed his cell phone to call Babs. Babs was able to see from Ghoul's analysis that the tech in the man's blood was the same as the stuff used by the villain the Calculator.