The Wirwir are wandering ghouls that hunt down corpses. Like a hermit crab, they typically live inside their victim to prevent other ghouls from stealing it.
Among the Apayao, there was a ghastly creature who "went everywhere spending his time looking for the dead." He exhumed human remains from cemeteries and lived off of them. The native priests appeased Wirwir out of fear that he might consume the dead. The home of Wirwir, a ghoulish Apayao creature, was reportedly discovered in a Mount Anay Forest and had "a cave full of valuable properties taken from the graves of dead persons."
Other than their infamous tenacity in pursuing the devouring of human flesh, little much is known about these horrific creatures. They are well-known from the mythology of the Apayao people of the Philippines' namesake Province, where it is sometimes claimed that local priests were compelled to appease the ghouls before burying new bodies because they were afraid the repulsive creatures would promptly dig them up again and devour them.
Source:
Elartwyne Estole - https://elartestole.artstation.com/projects/q9YlXP
Philippine Spirits - https://phspirits.com/wirwir/
