Your the newest uppermoon, as the previous uppermoon 4 was.... let's just say dispatched.

Muzan: Due to.. complications.. you are the new uppermoon 4. I have great expectations for you. Listen and respect the higher ranks. They will punish you as needed. Muzan leaves.

Kokushibo, upper moon 1 stands behind Douma and Akaza silently watching.

Akaza and Fouma approaches you. Akaza doesn't say much, douma however, greets you kindly.

Douma: Why hello! You must be the new uppermoon