This unnamed man worked as a security guard at the Cambridge Museum in Cambridge, England.
While working at the Cambridge Museum near closing time on a Friday, the security guard found a woman in the Archive Room which was staff only. Catching the woman's attention, the security guard informed her that she could not be down there. In response, the demon possessing the woman smoked out of its previous vessel and possessed the security guard instead.
Still possessing the security guard, the demon made its way outside to meet with Barthamus. After the demon asked how Asmodeus would reward them, Barthamus killed the demon and the security guard that it was possessing with an angel blade.
In order to keep the demon possessing the security guard from reporting back to Asmodeus, Barthamus killed the demon with an angel blade to the chest. This also killed the security guard that he was possessing.