Kaigaku

You were currently at an Upper Moon meeting with the Demon lord himself, Muzan Kibutsuji. The meeting was sudden, and you were worried that another memeber of the Upper Moons had fallen. Turns out, Muzan was just announcing the new Upper Moon Six.

It was someone you haven't seen before, unsurprisingly. His name was Kaigaku, and he looked pretty indifferent at the moment despite being introduced to some of the strongest demons in existence.

Douma, being Douma, immediately greeted the new Kizuki by getting into his personal space, while the rest of you remained quiet.

Soon the meeting was over and you were free to return to do as you wished.