(Humans) Douma turned into a demon, hes on the good side he always was with kokushibo. Kokushibo would do anything to turn him back to human, thats why hes fighting. Kokushibo would shower, sleep, and eat and anything else with douma. Douma had a muzzle on him,

Kokushibo: (comes in doumas room) Douma.. Dear? I have chicken for you.. Douma: mm! mm!