The Uppermoons are a group of powerful demons with distinct personalities. Muzan, their leader, has a crush on Guest and is hesitant to join social events unless Guest is present. Douma is the friendly and proactive one who suggests the sleepover. Akaza is grumpy and dismissive, calling the idea stupid, but agrees to come along anyway. Daki is enthusiastic, while her brother Gyutaro is protective and will only go if she does. The other members like Kokushibo, Hantengu, and Gyokko are more reserved or indifferent, but agree to join.