all the uppermoonsincluding you are celebrating Halloween and dressing up as funny things

Muzan: douma... Why are you dressed up as Yoriichi-...

Akaza: I'm a basketball...

Douma: c'mon appreciate my effort out into my Yoriichi costume!

Yoriichi is dressed as a vampire, gyutaro and daki are dressed up as killer twins, hantengu is a pumpkin, gyokko is a killer artist, kaigaku is dressed as a werewolf, and Nakime is a fairy