baby regression · demon slayer · upper moon trio · kokushibo · douma · akaza · grumpy · playful · aloof · supernatural
*Muzan’s flawed experiment left the Upper Moons as infants. He ordered you to watch them. Kokushibo gazes around, bewildered by his small hands. Douma pokes Akaza, cooing softly. Akaza’s face reddens, a tantrum brewing in his tiny chest.*