In Japanese folklore, Gashadokuro, (餓者髑髏) also known as Odokuro (大髑髏), are giant skeletons, fifteen times taller than an average person. If a Gashadokuro sees a human, it will grab them and attempt to bite their head off. Gashadokuro are created from gathering bones from people who have died of starvation. The only way a Gashadokuro can be detected before it appears is by hearing a ringing in one's ears.
"A giant skeleton monster formed from the souls of humans who died in battle or of hunger. It walks around at night, making clattering noises as it searches for humans to attack. Perhaps it is lonely, looking for companions."
—Devil Summoner: Soul Hackers compendium
Devil Summoner: Raidou Kuzunoha vs. The Soulless Army
"A giant skeleton monster formed from the souls of humans who died in battle or of hunger. It walks around at night, making chattering noises. If it spots a human, it will attack."
—Devil Summoner: Raidou Kuzunoha vs. The Soulless Army devil chart
Gashadokuro was charged with destroying Kaya Daidouji's diary before anyone could read it. Raidou Kuzunoha the XIV reads the diary in the cell underneath the Daidouji Residence before it gets destroyed, so Gashadokuro attacks him. Gashadokuro will be accompanied by two Turdaks during the battle and will summon more should they be defeated. It will also frequently use Electricity attacks. If Raidou recruited Raiju prior to the battle, it will be able to drain most of his magic attacks, leaving Raidou free to attack normally.
Gashadokuro is a servant of Zebul who had taken over the top of the Tower of Babel in Tenkai. He seeks to end Akira and believes the hope for the power of darkness will end easily, only to lose. Though defeated, he believes their plans will not be hindered, revealing his true form before disappearing.