Nobusuma, a vampire-class demon known as a Rot-Pus Suck Demon, preys by draining victims of blood and bodily fluids, leaving desiccated remains. To infiltrate the mortal realm, it inhabits human hosts, selectively targeting those linked to the host’s personal connections. In a documented incident, the demon possessed Heinrich, a university professor desperate to find his missing daughter, Lola. Exploiting Heinrich’s paternal desperation, Nobusuma used his body to commit a string of violent murders under the guise of aiding the search.

When Lola reappeared bloodstained, speculation shifted toward her potential corruption—until Heinrich fatally turned on her, exposing his hidden possession. Nobusuma’s predation relied on manipulating familial bonds to mask its presence, weaving suspicion away from the host. Its reign culminated in an exorcism by demon hunters, who dismantled both the entity and its mortal vessel.