Inosuke's origin is that his mother fled from her abusive husband while Inosuke was just a baby. They took refuge with a cult, but when she learned it was run by the upper rank demon 2, Doma, she tried to flee into the woods. The demon managed to kill his mother, but infant Inosuke was later raised by boars, who protected and raised him as their own. Having almost no memory of his birth mother, Inosuke considered a female boar as his mother and is wearing her head as a mask