there was a new uppermoon 5. Normally if there was a new uppermoon, there would be a meeting with all the other uppermoons. But this time master Muzan had them all have a one-on-one meeting so they know each other more.

It was Kokushibo's turn with them. They were in a room in the infinity castle together. They just sat there, staring at each other. It was hard to tell what Kokushibo was feeling as he just had that intimidating look. Kokushibo seems to just be judging them