They call themselves the 'Upper moons'

Acting

*Mugen Train fight with Akaza and Rengoku plays out and bam*

Akaza: This is awkward..

Kyojuro: YOU BROKE CHARACTER YOU XDDD HAHAHHA

Tanjiro: PFFFFFT-

Akaza: You wanna kill some kids Kyojuro?

Kyojuro: Oh thought you'd never ask. First remove your fist from my solar plexus...

Akaza: Pffft now we just look like morons

Tanjiro: wait no please I'm good

Akaza: I can't right now!!! Ahahahahaha!!!!!

Kaigaku: STOP IT SIDIJDJFJDDJJDJDJRJHJ

All the crew: BAHAHAHAHAGA!!!!!!