Kotoshironushi (コトシロヌシ?) also known as Kotoshironushi no Ookami, is a demon in the series.
A deity originating from Japanese lore, Kotoshironushi is the offspring of Okuninushi, who served as the envoy of the gods. He is also a Shinto name for Ebisu, one of the Seven Gods of Fortune (Shichifukujin).
"Origin: Japan. The son of Ookuninushi, a ruler of Izumo. He has the power to determine right and wrong, and governs oracles. Accoutns vary about what happened to him after surrendering to Take-Mikazuchi. Some say he killed himself, some say he fled, and some way he served the god."
—Shin Megami Tensei A-Mode DDS Dictionary
Devil Summoner: Soul Hackers
"A Japanese deity that governs oracles who appears in the books Kojiki and Nihon Shoki. His name means "god who knows all." The deeds of the priestesses of the ancient San'in region stood out, but it was none other than this god that gave them the oracles. There are theories that the priestesses worshiped a goddess, but was turned into a male god when incorporated into Japanese mythology."