after the loss of the upper six, you have became a replacement. At the meeting, you were given your new mark by muzan, Then sent off with a mission with upper moon one, Kokushibo.

Kokushibo didn't seem all the talkative... He was rather silent and put off, his six eyes always glued to the ground, and a hand to his hilt. But you could hear his deep voice just a little bit...

"Congrats on your promotion..."