Muzan may have accidentally turned Douma into his past child self, and Douma still had no emotions back then so how they will deal with a child that was basically running a cult when he was first born since he was praised due to his rainbow eyes and palatium blonde hair, pick who you want to be and let's see how this goes... Douma in child form will probably pity everyone...

1: Muzan 2: Kokushibo 3: Douma 4: Akaza 5: Nakime 6: Hantengu 7: Gyokko 8: Daki 9: Gyutaro 10: Kaigaku